8.1. Command Reference

Complete list of every command recognised by the IQcad command line. Type a command name or its alias and press Enter.

8.1.1. CAD Commands

8.1.1.1. File

Command	Alias	Description
NEW	—	Create a new empty drawing.
OPEN	O	Open a drawing file.
SAVE	—	Save the drawing to its current file. An untitled drawing prompts for a name and is then added to the recent-files list.
SAVEAS	—	Save the drawing under a new name. The chosen file joins the recent-files list.
CLOSE	—	Close the current drawing.
EXPORTDXF	—	Export the drawing to DXF.
EXPORTIMAGE	—	Export the drawing to an image file.
EXPORTPDF	—	Export the drawing to PDF. For sheet output use PLOTPDF, which honours the layout’s page setup.

8.1.1.2. Drawing

Command	Alias	Description
LINE	L	Draw a line (click start and end points, or type coordinates).
POLYLINE	PL, PLINE	Draw a polyline (multi-segment, optional arc segments via A).
MULTILINE	ML	Draw a multiline (parallel strands using the current multiline style).
ARC	A	Draw a three-point arc (start, pass-through, end).
ARC_SCE		Arc: Start, Center, End (3 mouse clicks).
ARC_SCA		Arc: Start, Center, then mouse defines endpoint (angle).
ARC_SCL		Arc: Start, Center, then mouse defines endpoint (chord length).
ARC_SEA		Arc: Start, End, then mouse defines arc midpoint (angle).
ARC_SED		Arc: Start, End, then mouse defines arc midpoint (direction).
ARC_SER		Arc: Start, End, then mouse defines arc midpoint (radius).
ARC_CSE		Arc: Center, Start, End (3 mouse clicks).
ARC_CSA		Arc: Center, Start, then mouse defines endpoint (angle).
ARC_CSL		Arc: Center, Start, then mouse defines endpoint (chord length).
ARC_CONT		Arc: Continue from last entity’s endpoint.
CIRCLE	C	Draw a circle (centre + radius).
CIRCLE_CD		Circle: Centre, then mouse defines diameter.
CIRCLE_2P		Circle: Two points define the diameter endpoints.
CIRCLE_3P		Circle: Three points define the circumscribed circle.
ELLIPSE	EL	Draw an ellipse (centre, then X-radius, then Y-radius).
SPLINE	SP	Draw a spline through a series of control points.
RECTANGLE	REC	Draw a rectangle (two opposite corners).
POLYGON	POL	Draw a regular polygon (number of sides, centre, radius).
HATCH	H	Create a hatch fill area.
TEXT	T	Place single-line text.
MLEADER	MLD	Draw a multileader (arrowhead, landing, and text label).
ARROW	AR	Draw an arrow entity.
POINT	P, PT	Place a point marker.
XLINE	XL	Draw a construction line (infinite in both directions).
3DFACE	3F	Draw a 3-D face (3 or 4 corner points).
3DPOLY	3DP	Draw a 3-D polyline (vertices with X, Y, Z). Supports spline-fit (Catmull-Rom interpolation in full 3-D). Right-click to finish.
EXTRUDE	EXT	Extrude a closed 2D profile along the Z-axis to create a 3D polyface mesh. Accepts closed polylines, circles, ellipses, and rectangles. Prompts for extrusion height (positive = up, negative = down) and whether to close top and bottom with triangulated caps. The source profile is removed after extrusion. Supports pre-selection. Output: TCADPolyfaceMesh (DXF-compatible polyface mesh).
SWEEP	SW	Sweep a closed 2D profile along a path curve to create a 3D polyface mesh. Select a profile, then a path. Valid paths: open polyline, 3D polyline, arc, spline, or civil alignment. Options available before path selection: T (Twist) — rotate profile along path (degrees); S (Scale) — taper from 1.0 to end factor; R (Range) — specify start/end chainage for alignment paths; I (Interval) — fixed path sampling distance; N (Segments) — profile vertex count for circles/ellipses, or Douglas-Peucker simplification for polylines. Supports pre-selection (one profile + one path). Output: TCADPolyfaceMesh.
IMAGEATTACH	IA	Attach a raster image (PNG, JPG, BMP, TIFF). Enter file path or press Enter to browse. If an ESRI world file (.jgw, .pgw, .bpw, .tfw) exists, prompts Use georeferenced placement? [Yes/No]. Yes (default): places at the world-file origin automatically. No: interactive placement with pre-filled width and rotation.
BEZIER	BEZ	Draw a Bézier curve.
TABLE	TBL	Place a table. Click an insertion point to create a default 3 × 3 table. After placement, edit cells, row/column counts, and style in the Object Inspector. Cells support formulas and clipboard paste from Excel / LibreOffice.
MTEXT	MT	Place multiline text.
SOLID	SO	Draw a 2D filled solid.
WIPEOUT	WO	Mask an area with a background-coloured polygon, hiding what lies beneath. Options: pick points and right-click to close (default); Polyline converts a polyline — the selected one, or it prompts for one — closing it automatically if it is open, and optionally erasing it; Frames turns every wipeout’s outline on or off (the WIPEOUTFRAME system variable).
-HATCH	BH	Create a hatch from the command line (no dialog).

8.1.1.3. Modify

Command	Alias	Description
ERASE	E	Delete selected objects. If no objects are pre-selected, prompts “Select objects:” — pick objects then right-click to confirm or press Escape to cancel (matches AutoCAD behaviour).
MOVE	M	Move selected objects (base point → destination point).
COPY	CO	Copy selected objects.
ROTATE	RO	Rotate selected objects about a base point.
SCALE	SC	Scale selected objects from a base point.
OFFSET	O	Offset an entity by a distance or through a point. Supports Line, Circle, Arc, XLine, Polyline, Ellipse, Spline, and Rectangle. The default distance is stored in the OFFSETDIST system variable. Sub-options: T = offset through a picked point, E = erase the source entity after offsetting, U = undo last offset. A phantom preview shows the offset result while picking the side.
MIRROR	MI	Mirror selected objects across a two-point axis.
TRIM	TR	Trim objects to cutting edges. Phase 1: select cutting edges (or type ALL). Phase 2: click the portion to remove.
EXTEND	EX	Extend a line to a boundary edge. Phase 1: select boundary edges. Phase 2: click the end to extend.
CHAMFER	CHA	Chamfer (bevel) two lines. Sub-option D sets chamfer distances ($CHAMFERA / $CHAMFERB). Zero distance trims to intersection.
FILLET	F	Fillet (round) two lines with an arc. Sub-option R sets the radius ($FILLETRAD). Zero radius trims to intersection.
BREAK	BR	Break an entity between two points. Pick the object (the pick point is the first break point), then “Specify second break point or [First point]:”. F = re-pick first point, @ = break at a single point with no gap. Lines, arcs and polylines split into two entities (or are shortened at an end); a circle becomes an arc (the portion counter-clockwise from the first to the second point is removed); closed polylines become one open polyline. Single undo step restores everything.
JOIN	J	Join lines, arcs and polylines. Collinear touching lines merge into one line; touching arcs on the same circle merge into one arc; other touching chains merge into a polyline. Arc segments are preserved as true bulge (curved) segments. Reports “N object(s) joined into M.”
ALIGN	AL	Align objects using 1–2 source/destination point pairs: first pair translates; second pair adds rotation (Enter after the first pair = move only). Then prompts “Scale objects based on alignment points? [Yes/No] <No>”. Objects picked as destination reference are not affected.
DIVIDE	DIV	Place point entities dividing an entity into N equal segments (2–32767). Open entities get N−1 interior points; closed entities (circles, closed polylines) get N points. Works on Line, Polyline, Arc, Circle, Ellipse, and Spline entities.
MEASURE	ME	Place point entities along an entity at a fixed interval, starting from the end nearest the pick point. The final partial segment remains. Same entity types as DIVIDE.
ARRAY	ARR	Rectangular, polar or path array of the selected objects. Prompts “Enter array type [Rectangular/Polar/PAth] <Rectangular>”. Rectangular: rows, columns, row/column spacing (negative spacing allowed). Polar: centre point, item count, angle to fill <360>, rotate items Yes/No. Path: pick a path entity, Divide (count) or Measure (spacing) placement, align items with the path Yes/No. Creates plain copies (alias is ARR because AR belongs to ARROW).
PEDIT	PE	Edit a polyline. Select a polyline (or Line/Arc/Circle to convert). Sub-options: Close / Open, Join, Width, Edit vertex (N/P/M/I/D/S sub-mode), Spline, Decurve, Reverse, eXit. Supports both 2D and 3D polylines.
UNDO	U	Undo the last action.
REDO	—	Redo the last undone action.
COPYCLIP	CC	Copy the selection to the clipboard, whichever tab (model or a layout) is active. Stamps the clipboard with the source space and drawing scale so a later paste can auto-scale.
CUTCLIP	CX	Cut the selection to the clipboard, whichever tab (model or a layout) is active. Stamps the clipboard with the source space and drawing scale so a later paste can auto-scale.
PASTECLIP	CV	Paste entities from the clipboard onto whichever tab is active. A ghost of the entities follows the cursor; click (or type x,y) to place them, Esc, a right-click, or pressing Enter on an empty command line cancels. Pasting between model and a layout auto-scales by the drawing scale, so text and tables land at the size they plot at; viewports are never carried across the clipboard (copying leaves them out). Legacy clipboards without scale metadata paste unscaled.
PASTEORIG	—	Paste entities from the clipboard at their original coordinates, onto whichever tab is active. Same auto-scaling as PASTECLIP, but non-interactive.
DUPLICATE	DU	Duplicate the selected entities in place.
SELECTALL	SA	Select every entity on the active tab.

8.1.1.4. Super Tools

Express/CadTools-style helpers. Full workflow notes: Super Tools.

Command	Alias	Description
FLATTEN	—	Set Z = 0 on the selected objects. Press Enter at the selection prompt to flatten the whole drawing. Also zeros polyline Elevation. Reports how many objects changed. Undoable. Ribbon / menu: Super Tools → Cleanup.
PLSIMPLIFY	PLSIM	Douglas–Peucker vertex reduction on selected 2D/3D polylines. Prompts for a deviation tolerance (drawing units; default 0.01, session-remembered). 2D polylines use XY deviation; 3D polylines use 3D. Arc bulges densify then clear; spline-fit is cleared. Optional PLSIMPLIFY 0.05 when objects are pre-selected. Undoable. Ribbon / menu: Super Tools → Polylines.
PLGETZ	PGZ	Sample Z from a surface or point cloud along selected paths (2D/3D polylines and lines; multi-select OK). Sample mode Vertices (default) / Interval / Both; Vertex interval (default 1) is prompted only for Interval or Both. Missing samples use Z = 0. 2D polylines are replaced by 3D polylines; 3D polylines and lines (vertices mode) update Z in place; densified lines become 3D polylines. Undoable. Super Tools → Polylines → Get Z….
BESTFITLINE	BFL	Best-fit 3D line (PCA) through vertices of the selection (points, lines, polylines; multi-select). Creates a new LINE on the current layer spanning the point cloud. Needs ≥ 2 distinct points. Undoable. Super Tools → Polylines → Best Fit Line….
DGRID	DG	Draw a coordinate grid in model space. A Create Grid dialog sets the spacing, text height, target layer, style (Draw lines or Draw ticks) and whether to label the coordinates; you then pick two opposite corners of the area. The grid is real geometry, so it plots and can be edited.

8.1.1.5. View

Command	Alias	Description
ZOOM	Z	Zoom the viewport. Sub-options: E = extents, W = window, + / - = in / out, P = previous.
ZOOMOBJECT	—	Pick an entity on the canvas; the viewport zooms to its bounding box with a small margin. Also available from the Civil Prospector right-click menu on Surface, Alignment, Profile View and Point Cloud nodes.
PAN	—	Activate real-time pan (or use middle-mouse drag).
REGEN	—	Force a full redraw of the canvas.
UCSICON	—	UCS icon display: ON, OFF, ORigin, NOorigin, Size.
3DORBIT	ORBIT	Interactive 3D orbit mode — rotate the view around the model.
PLAN	—	Return to the standard top-down plan view.
VPOINT	VP	Set the viewpoint to a preset direction.
VIEWTWIST	VT	Set a 2D view rotation angle.
ALIGNVIEW	AV	Align the view to two picked points on the canvas.
PLANVIEW	—	Reset the view twist back to north-up (0° rotation).
DRAWORDER	DR	Display order menu. Sub-options: F = front, B = back, A = above, U = below (under).
FRONT	—	Bring selected objects to front (drawn last).
BACK	—	Send selected objects to back (drawn first).
ABOVE	—	Move selected objects above a reference object (click to pick).
BELOW	—	Move selected objects below a reference object (click to pick).
ZW	—	Zoom window (pick two corners).
REDRAW	—	Refresh the display.

8.1.1.6. Inquiry

Command	Alias	Description
LIST	LI	Print all properties of the selected object.
ID	—	Click a point and report its world X, Y, Z.
DIST	DI	Measure the distance between two clicked points.
AREA	AA	Measure an area (pick points or select an object).
ANGLE	AN	Measure an angle (pick vertex + two ray points).

8.1.1.7. Blocks

Command	Alias	Description
BLOCK	B	Create a block definition from selected entities.
INSERT	INS	Insert a block reference.
BLOCKS	BL	List all defined blocks in the drawing.
BEDIT	BE	Edit a block definition in-place.
BCLOSE	BC	Close the block editor and return to the drawing.
BLOCKMANAGER	BM	Open the Block Manager dialog.
EXPLODE	—	Explode blocks, multilines, and polyface meshes into individual entities.
MESH2SURFACE	M2S	Convert a polyface mesh entity into a TIN surface.
SURFACE2MESH	S2M	Convert a TIN surface into a polyface mesh entity.

8.1.1.8. Dimensions

Command	Alias	Description
DIMLINEAR	DIML	Create a linear (horizontal/vertical) dimension.
DIMALIGNED	DIMAL	Create an aligned dimension (measures true distance).
DIMANGULAR	DIMANG	Create an angular dimension.
DIMRADIUS	DIMRAD	Create a radius dimension.
DIMDIAMETER	DIMDIA	Create a diameter dimension.
DIMORDINATE	DIMORD	Create an ordinate dimension.
DIMARC	—	Create an arc length dimension.
DIMBASELINE	DIMBASE	Create a baseline dimension series.
DIMCONTINUE	DIMCONT	Create a continue dimension chain.
DIMJOGGED	DIMJOG	Create a jogged radius dimension.
DIMSTYLE	—	Open the Dimension Style Manager dialog.

8.1.1.9. Settings & Drawing Variables

Rows whose description begins with “Set $NAME” are system variables, not standalone commands — change them with SETVAR <name> <value> (alias SV), for example SETVAR LUNITS 2. The remaining rows (UNITS, GRID, ORTHO, SNAP, OSMODE, LIMITS, MAKELAYER, …) are regular commands.

Command	Alias	Description
UNITS	—	Multi-step wizard to set linear/angular units and precision.
LUNITS	—	Set $LUNITS — linear format (1 = Scientific, 2 = Decimal, 3 = Engineering, 4 = Architectural, 5 = Fractional).
LUPREC	—	Set $LUPREC — linear precision (0–8 decimal places).
AUNITS	—	Set $AUNITS — angular format (0 = Decimal degrees, 1 = DMS, 2 = Grads, 3 = Radians, 4 = Surveyor).
AUPREC	—	Set $AUPREC — angular precision (0–8 decimal places).
ANGDIR	—	Set $ANGDIR — angle direction (0 = CCW, 1 = CW).
ANGBASE	—	Set $ANGBASE — base angle in degrees (0 = East, 90 = North).
INSUNITS	—	Set $INSUNITS — insertion units (0 = Unitless, 1 = Inches, 2 = Feet, 4 = mm, 5 = cm, 6 = m, 7 = km).
MEASUREMENT	—	Set $MEASUREMENT — 0 = Imperial, 1 = Metric.
UNITMODE	—	Set $UNITMODE — 0 = stacked display, 1 = single string.
LIMCHECK	—	Set $LIMCHECK — 0 = off, 1 = enforce drawing limits.
LIMITS	—	Set $LIMMIN / $LIMMAX — drawing limits (lower-left, upper-right).
LTSCALE	—	Set $LTSCALE — global linetype scale factor.
TEXTSIZE	—	Set $TEXTSIZE — default text height.
DIMSCALE	—	Set $DIMSCALE — dimension scale factor.
OSMODE	—	Set $OSMODE — object snap bitmask (1 = END, 2 = MID, 4 = CEN, 8 = NOD, 16 = QUA, 32 = INT, 128 = PER, 256 = TAN, 512 = NEA).
GRID	—	Set grid spacing or toggle ON / OFF (also F7).
GRIDUNIT	—	Set $GRIDUNIT — grid spacing (saved with drawing).
GRIDMAJOR	—	Set $GRIDMAJOR — minor lines between bold major lines (default 5).
GRIDTEXT	—	Toggle $GRIDTEXT — X/Y coordinate labels on major grid lines.
GRIPSIZE	—	Set $GRIPSIZE — grip square half-size in pixels (default 5).
ORTHO	—	Toggle orthogonal constraint (also F8).
SNAP	—	Toggle grid snap (also F9).
ORTHOMODE	—	Set $ORTHOMODE — 0 = off, 1 = on (saved with drawing).
SNAPMODE	—	Set $SNAPMODE — 0 = off, 1 = on (saved with drawing).
PICKADD	—	0 = replace selection, 1 = additive selection.
PICKAUTO	—	0 = no implied window, 1 = implied windowing.
SELECTIONCYCLING	—	Overlapping pick (0 = off, 1 = badge only, 2 = badge and list, the default). Negative values remember the last on-mode. Toggle with Ctrl+Shift+W.
LAYERS	LA	Open the Layer Manager dialog.
TABLESTYLE	—	Open the Table Style Manager (create, edit, and delete table styles).
SETVAR	SV	Set any system variable by name and value.
SCALELISTEDIT	SLST	Edit the scale list (add, remove, rename annotation scales).
CURRENTLAYER	CLAYER	Set the active layer: CURRENTLAYER name.
MAKELAYER	—	Create a layer: MAKELAYER name [color].
LINETYPES	LT	Open the Linetypes dialog.
TEXTSTYLE	ST	Open the Text Styles dialog.
PLOTSTYLE	—	Open the Plot Style dialog.
POINTSTYLE	—	Open the Point Style dialog.
PROPERTIES	PR	Toggle the Object Inspector (properties) panel.

8.1.1.10. Layout & Paper Space

Command	Alias	Description
LAYOUT	LO	Layout management. Sub-options: N = new, D = delete, L = list (* marks active), S = set active.
MVIEW	MV	Create a viewport in paper space (Fit or 2-point). Must be on a Layout tab.
MVSETUP	MVS	Reserved for viewport rotate/scale/title setup. Not implemented in this release — use the Object Inspector for viewport scale and rotation.
VPCLIP	—	Clip a viewport boundary to a custom shape.
VPFADE	VPF	Toggle viewport fade (dimmed display of inactive viewports).
VPSCALEBAR	VPSB	Toggle scale bar display in a viewport.
PAGESETUP	—	Open the Page Setup dialog for the active layout.
PLOTPDF	PDF	Unified PDF export command. Exports the active layout to PDF. Replaces the older EXPORTPDF alias.
PLOT	PRINT	Open the Print dialog (Ctrl+P).
PLOTALL	—	Export all layouts to a multi-page PDF.

8.1.1.11. Utility

Command	Alias	Description
PURGE	—	Remove all unused items (layers, blocks, styles, linetypes).
PURGELAYERS	—	Remove unused layers only.
PURGEBLOCKS	—	Remove unreferenced block definitions.
PURGESTYLES	—	Remove unused text, dimension, and table styles.
PURGELINETYPES	—	Remove unused linetypes.
AUDIT	—	Check drawing file integrity and report issues.
RECOVER	—	Fix drawing integrity issues found by AUDIT.
RECOVERCREATELAYERS	—	Recover and recreate any missing layers referenced by entities.
DWGPROPS	DRAWINGPROPS	Print drawing statistics (entities, layers, blocks, styles, civil objects, model summary) to the command line. Also available as a dialog on File › Drawing Utilities › Properties….

8.1.1.12. Display Performance (experimental)

Command	Alias	Description
RETAINEDGEOMETRY	RETAINED	Toggle the retained-geometry display mode (ON / OFF, or no argument to toggle). Speeds up pan/zoom on very large drawings. Off by default.
RETLOD	RETAINEDLOD	Tune the retained level of detail live: RETLOD FACE <n> / DENSITY <n> / PTSIZE <n>; no argument prints the current values.
RETAINEDSTATS	—	Print retained-geometry diagnostics (bucket and vertex counts, level of detail, view mode).

8.1.1.13. Miscellaneous

Command	Alias	Description
HELP	?	Show command help in the command line.
MAPBG	—	Toggle background map tile layer behind the drawing canvas.
MAPSETTINGS	—	Open the Map Settings dialog to add, edit, delete, and select map tile providers (XYZ and WMS).

8.1.1.14. Diagnostics and Test Commands

Support and development aids. They are not part of a normal drawing workflow, but they are the fastest way to answer “is this my machine or the drawing?” when reporting a problem.

Command	Alias	Description
GPUTEST	—	Test the machine’s GPU/VBO capability and benchmark it. Run this when display performance is poor, before changing the GPU rendering setting (Application Settings).
ADDSAMPLEENTITIES	—	Add one of every entity type to the drawing. Useful for checking rendering, export round-trips and style changes against the full set.
ADDTUNNELSECTION	—	Add a sample tunnel section line.
ADDREALTUNNELSECTION	—	Add a real (MEIS) tunnel section line, for testing deviation analysis against measured data.

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8.1.2. Civil Commands

8.1.2.1. Survey Points

Command	Alias	Description
SURVEYPOINT	SRVPT	Place an AEC survey point (Northing, Easting, Elevation).
TSLINE	TSL	Draw a tunnel section line (measured cross-section profile for deviation analysis).
TSOPTIMIZE	TSOPT	Optimize the fit between a measured tunnel profile and its theoretical section. Supports five optimization levels: 2P (translate), 3P (translate + uniform scale), 4P (translate + non-uniform scale), 5P (translate + scale + rotation), and per-vertex radial adjustment. Constraints: max overbreak/underbreak DR, max overbreak/underbreak area. Uses the Nelder-Mead simplex algorithm for 2P-5P modes.
SURVEYPOINTSTYLE	SPS	Edit survey point styles.
TSLADDPOINT	TSLADD	Add points to a tunnel section line.
TSLDELETEPOINT	TSLDEL	Delete points from a tunnel section line.
TSLCLOSEINVERT	TSLINV	Add invert points near the axis to close a tunnel section line.
TSLCLOSETOLEVEL	TSLCLVL	Extend the section line ends to a target elevation.
TSLSORT	—	Sort tunnel section line points radially around the axis.

8.1.2.2. Surfaces

Command	Alias	Description
CREATESURFACE	CS	Create a TIN surface. If survey points exist in the drawing they are triangulated automatically; otherwise an empty surface definition is created so point groups and boundaries can be attached later.
IMPORTDEM	IDEM	Import a GeoTIFF DEM (.tif) as a grid-backed surface. Decodes the raster natively — uncompressed, Deflate or LZW; single-band Float32 or Int16; strips or tiles — and georeferences it from the GeoTIFF tags (model tiepoint, pixel scale, CRS); no world file or external conversion is required. Elevations are answered by bilinear interpolation on the grid (no triangulation), so the DEM can be sampled by section sheets exactly like a TIN. NoData, voids and non-finite cells return no elevation (honest gaps, never fabricated ground). The CRS is reported but not reprojected — the DEM must already share the drawing’s coordinate system. The surface is persisted in the drawing and re-decoded from its source file on reopen (a warning is shown if the file has moved).
CLOUDSURFACE	CLS	Build a grid surface from a loaded point cloud, for comparison against a DEM or design surface. Bins the cloud’s ground points (LAS class 2) into a regular grid, keeping the lowest Z per cell (bare earth); if the cloud has no ground classification it falls back to all points and suggests running PCGROUND first. Cell size defaults to about twice the average point spacing; empty cells stay void (no fabricated ground from stray returns). Produces a surface named Cloud_<name> that can be sampled in a section sheet alongside the DEM, with cut/fill reported between the two — the intended way to validate a DEM against survey data.
DEMTOTIN	D2T	Resample a DEM surface into a new editable TIN surface, leaving the DEM intact. Pick the DEM, choose a region (whole DEM, a rectangle, or an existing closed polyline), a cell size, and an optional decimation tolerance. The DEM is sampled (bilinear) onto a regular grid tightened to the region — so a small high-detail region does not hit the whole-DEM cell cap — and triangulated; voids and out-of-region cells become gaps. The result is a normal TAECC_SURFACE named <DEM>_TIN (source type Derived) that can be edited, used in corridors, or contoured like any TIN. (Full-resolution DEMs are far too large to triangulate directly, so a sensible cell size is required.)
ADDSURFACEPOINTS	ASP	Add all survey points to a named surface and build (or rebuild) the TIN.
ADDSURFACEENTITIES	ASE	Add selected drawing objects to a surface. Supported entity types: 3DFace (loaded as TIN triangles directly), Line, Polyline, Spline, Point, and Survey Point (vertices triangulated). If only one surface exists it is used automatically; otherwise prompts for the surface name.
REBUILDSURFACE	RS	Rebuild an existing surface TIN from the current survey points.
ADDSURFACEBOUNDARY	ASB	Add a boundary polyline to a surface (outer or hole).
DECIMATESURFACE	DS	Decimate (simplify) a TIN surface. Prompts for the surface name (auto-selects if only one exists) and a max elevation tolerance. Two algorithms are selected automatically: grid-based O(n) for surfaces > 100K points (single-pass min/max Z per cell, capped at 50K output points, < 5 sec for 4M points); greedy insertion for ≤ 100K points (convex hull seed, binary max-heap, batched refinement).
DELETESURFACE	—	Delete a surface by name.
SURFACEPROPERTIES	—	Display surface statistics (points, triangles, area, elevation range) and the surface’s source type (Survey Points / Point Cloud / DEM / LandXML / Merged / Derived). The source type is also shown next to each surface in the Civil Toolspace tree.
EXPLODECONTOURS	EXC	Extract a surface’s contour lines into editable polyline entities, placed on <Name>-Contour-Major / -Minor layers at each contour elevation (DXF-exportable). Works for any surface with contours — including grid-backed DEM surfaces, whose contours are generated by marching squares directly on the elevation grid (no triangulation). If the surface style has no contour intervals set, the command reports that rather than producing nothing.
SURFDIFF	—	Compare two TIN surfaces to build a difference (diff) surface whose elevation is the vertical deviation dz between them. Opens the Compare Surfaces dialog (sources, cell size, tolerance, max deviation, sign convention, insert/stats options) with a live overlap/cell-count preview. The result is a deviation-banded surface DIFF_<A>-vs-<B>, saved with its comparison provenance so a volume report works later without the sources. Basis for earthwork QC.
PCDIFF	—	As SURFDIFF but compares a surface against a loaded point cloud (as-built). Adds a PC reducer choice (Median / Minimum / Mean) for collapsing multiple returns per cell to one ground value.
VOLUMEREPORT	VOLREPORT	Earthwork volume report for a comparison (diff) surface: cut, fill and net volumes, cut/fill/total areas, deviation statistics, and a per-band breakdown, integrated directly from the diff TIN. Uses the selected diff surface, or prompts when several exist. Opens as an HTML report in the system browser.
MERGESURFACES	MS	Merge two surfaces (paste or union) into a new or replaced surface.
SURFACESTYLE	SUS	Edit surface styles.
SURFBUILDSETTINGS	SBS	Edit per-surface build settings (triangulation algorithm and cleanup filters).
SLOPEPATH	SLP	Trace a maximum-slope gradient line along a sketched polyline. Select a 2D/3D polyline (or pre-select it); its vertices become waypoints and the command chains a gradient path through them across the surface, never exceeding the given maximum slope (%). Draws one 3D polyline draped on the terrain (collinear runs merged), keeps the sketch, and reports lengths, climb/descent, per-leg status and a per-vertex slope list.
FACE2SURFACE	F2S	Convert selected 3D faces into a surface.
ADDDXFFACES	ADF	Add 3DFACE entities imported from DXF to a surface. When the DXF carries 3DFACEs on several layers (typically one exported surface per layer), a dialog asks which layer(s) to import — either merged into the target surface, or, with Create a separate surface per selected layer checked, one new surface per layer named after it. Single-layer files import directly, no dialog.
ELEVTRACK	—	Toggle the surface Elevation Tracker overlay — a live Z readout of every visible surface under the cursor. See Elevation Tracker.

8.1.2.3. Surface Editing

Command	Alias	Description
SURFADDPOINT	SAP	Add a single point to a surface TIN interactively.
SURFDELETEPOINT	SDP	Delete a point from a surface TIN.
SURFMOVEPOINT	SMP	Move a surface TIN point to a new position.
SURFMODIFYELEV	SME	Modify the elevation of a surface point.
SURFSWAPEDGE	SSE	Swap a TIN edge between two adjacent triangles. Runs continuously (click edges one after another) until cancelled with Escape or right-click.
SURFADDLINE	SAL	Force an edge (breakline) between two surface points.
SURFDELETELINE	SDL	Remove a TIN edge.
SURFRAISELOWER	SRL	Raise or lower the entire surface by a specified elevation offset.
SURFUNDO	—	Undo the last surface edit operation.
SURFCLEAREDITS	SCE	Clear the surface edit log.
SURFLISTEDITS	SLE	List all surface edit operations performed since the last clear.
SURFADDBREAKLINE	SAB	Add the selected polyline(s) to the active surface as breaklines. Prompts for selection if nothing is pre-selected.
SURFDELETELONGEDGES	SDLE	Delete TIN edges longer than a threshold.
SURFHIDETRI	SHT	Hide TIN triangles: click inside each one, right-click to finish. The faces are kept in the edit log, not deleted.
SURFSHOWTRI	SWT	Restore every hidden triangle on the picked surface.
SURFREGRID	SRG	Resample a surface onto a regular grid and rebuild it as a gridded TIN.

8.1.2.4. Spot Elevations & Labels

Command	Alias	Description
SPOTELEV	SE	Place a spot elevation label at a clicked point on a surface.
ADDCONTOURLABEL	ACL	Place contour labels along surface contour lines with collision avoidance and uphill-readable rotation.

8.1.2.5. Alignments

Command	Alias	Description
ALIGNMENT	ALG	Create a horizontal alignment from PI (Point of Intersection) picks.
ALIGNREVERSE	—	Reverse the direction of an alignment.
ALIGNPROPS	—	Display alignment properties (element table, total length, etc.).
ALIGNFROMPOLYLINE	AFP	Create an alignment from a selected polyline with optional curve radius at interior PIs. Accepts 2D and 3D polylines; when the vertices carry differing elevations, optionally also builds the vertical profile from the vertex Z values (one PVI per vertex, with an optional vertical curve length at interior PVIs).
ADDPI	API	Click to insert a horizontal PI into an alignment. After picking the alignment, prompts once for a default curve radius (and, if > 0, a spiral length and type); the defaults are applied to every PI clicked in the run. Enter through the prompts for sharp radius-0 PIs. Enter finishes; every click is one undo step.
DELPI	DPI	Click a PI to delete it (nearest PI within the pick tolerance). End PIs may be deleted; an alignment keeps at least 2 PIs.
EDITPI	EPI	Click a PI to edit its curve radius and spiral (current values as defaults); end PIs have no curve.
ALIGNMENTREPORT	ALR	HTML alignment report, opened in the browser: plan sketch, PIs, horizontal elements, curve and spiral data, profile sketch, PVIs, vertical curve data, cross-section model and a station table.
ALIGNMENTSTYLE	ALS	Edit alignment styles.
POINTCHAINAGE	PCH	Report chainage and offset of picked points against an alignment.

8.1.2.6. Profiles

Command	Alias	Description
QUICKPROFILE	QP	Create a quick profile along a polyline or line by sampling a surface. Select source entity, then surface, then click insertion point.
CREATEPROFILEVIEW	CPV	Create a profile view from an alignment. Select alignment, then surface, then click insertion point. Samples ground profile and includes design vertical alignment if present.
DESIGNPROFILE	DP	Create a design profile (vertical alignment) inside a profile view. Click PVIs in the view, then enter curve lengths at each interior PVI.
ADDPVI	APV	Click inside a profile view to insert a design-profile PVI (curve length 0) at the clicked station/elevation, kept in station order.
DELPVI	DPV	Click a design-profile PVI in a profile view to delete it; deleting all PVIs clears the design line.
PROFILEPROPS	—	Display profile view properties (station range, elevation range, profile count).

8.1.2.7. Cross-Sections

Command	Alias	Description
CREATESECTIONSHEET	CSS	Create a cross-section sheet: select alignment, surfaces, interval, widths, grid layout, cut/fill surfaces, and click insertion point.
EARTHWORKVOLUMES	EWV	Compute and display earthwork volume table using the average end area method (cut/fill areas, volumes, cumulative totals).
CREATESECTIONSHEETDLG	CSSD	Create a cross-section sheet via dialog.

8.1.2.8. Parcels

Command	Alias	Description
CREATEPARCEL	PARCEL	Create a parcel from a closed polyline. Prompts for a parcel name, then click a closed polyline to define the boundary. Area and perimeter are computed automatically, and every corner is assigned a vertex name (see Parcel Vertex Names).
PARCELCHECK	PCHK	Check-and-fix hub for parcel vertex issues. Sub-options Report (default, read-only listing of duplicate vertices, unnamed vertices, mismatched shared corners, and duplicate names), Fix (repairs everything Report finds; offers to set the drawing’s vertex prefix), reNumber (confirmation-guarded full drawing-wide re-sequence), and Prefix (directly change the drawing’s vertex-name prefix; affects newly assigned names only).
PARCELTABLE	—	Insert a coordinate table (Point/X/Y/Dist. plus Perimeter and Area) for the selected parcels, or all parcels if none are selected. The Point column shows each corner’s vertex name, falling back to its index when unnamed.
PARCELREPORT	—	Generate an HTML report (sketch plus coordinate table) for the selected parcels, or all parcels if none are selected, and open it in the system browser.

8.1.2.9. Assemblies & Corridors

Command	Alias	Description
ASSEMBLIES	—	Open the Assembly Editor.
SAMPLEASSEMBLIES	SAS	Seed the assembly library with the six standard road templates (same set as the shipped standard-roads.iqal).
BUILDCORRIDOR	BC	Build the corridor for an alignment. Prints cut/fill, excavation-to-formation and per-material quantities.
CORRIDORAUTO	CA	Toggle corridor auto-rebuild (live update on alignment/surface edits).

8.1.2.10. Grading

Command	Alias	Description
GRADING	GRD	Open the Grading dialog and create/build a grading: project cut/fill slopes from a footprint polyline at a design elevation out to a target surface, producing a graded surface + cut/fill volumes. Supports flat / vertex-Z / drainage pad elevation, cut & fill slopes (as ratio or %), and height-triggered benching with an optional bench cross-slope. The grading is a self-drawing dynamic object that auto-rebuilds when its footprint / target / criteria change.
BUILDGRADING	BG	Rebuild a stale grading (used when Auto rebuild is turned off).
GRADINGBALANCE	GRDB	Solve the pad’s design elevation for a target net cut/fill volume (default 0 = balanced earthwork). Prompts for the target and a tolerance; reports the solved elevation, or that the target is not achievable for the pad. Flat/drainage pads only.
GRADINGEXTRACT	GRDX	Clone a grading’s internal graded surface into a standalone editable AECC_SURFACE (<Grading>_Extracted) for sectioning, contouring, differencing or corridor use.

8.1.2.11. Culverts

Command	Alias	Description
CULVERT	CULV	Create a parametric box culvert from a picked flow-line polyline (box barrel, slabs, subbase/protection, headwalls, wing walls, aprons and an optional fall chamber), built with default parameters; reports the part count and total volume.
CULVERTEDIT	CULVEDIT	Open the tabbed Culvert editor for a selected culvert (same as double-clicking it): edit box, wing, fall-chamber and material parameters with a live schematic and a live quantities table.
CULVERTSECTION	CULVSEC	Cut the culvert into a dimensioned 2D cross-section (or a longitudinal section with the LONG option), with outlines, material hatches and dimensions placed at a picked point.
CULVERTQUANTITIES	CULVQTY	Report concrete volumes grouped by component and material (grand total) and place a quantities table on the drawing.
CULVERTREPORT	CULVRPT	Write a PDF report of a selected culvert: identity, plan sketch with numbered stake-out points, cross and long sections, a volumes table, and an X/Y/Z coordinates table.

8.1.2.12. 3D Object Viewer

Command	Alias	Description
OBJVIEW	OBJECTVIEWER	Open the read-only 3D Object Viewer on the current selection (surfaces, gradings, culverts, 3D polylines): orbit/pan/zoom, display modes, show/hide and isolate objects, hover to inspect elevation / slope / aspect / area / part name, with live update while you edit in model space.

8.1.2.13. Point Groups

Command	Alias	Description
ADDTOGROUP	ATG	Add selected civil points to a point group. Select points first, then run the command. Lists existing groups by number; type a number to pick one or type a new name to create a group.
REMOVEFROMGROUP	RFG	Remove selected civil points from a point group. Select points first, then run the command and pick the group.
CREATEGROUP	CRG	Create a new point group. Prompts for a name, then lets you click individual points to add. Press Enter to finish.
CONVERTPOINTS	CPT	Convert selected AutoCAD point markers into AEC civil survey points. Optionally assigns a group and deletes the original point entities.

8.1.2.14. Coordinate Transformations

Command	Alias	Description
CSTRANSFORM	CST	Global coordinate transformation using common/control points. Supports Helmert 2D (4-parameter similarity), Affine 2D (6-parameter), and Polynomial degree 1/2/3. Interactive point picking on canvas, keyboard coordinate entry (E,N or E,N,Z), survey point lookup (#PointNumber), and file loading (.cpt JSON / .csv). Produces least-squares residuals, RMS statistics, and transformation reports (.trpt). Common points can be saved for reuse.
RUBBERSHEET	RBS	Non-uniform rubber-sheet transformation using control points. Two modes: Linear (Delaunay piecewise affine — C0 continuous) and Smooth (Thin Plate Spline — C2 continuous). Both achieve exact interpolation at control points (zero residual). Points outside the convex hull are extrapolated using the nearest triangle (linear) or affine far-field (smooth). Reports outside-hull count. Saves common points and transformation reports.

8.1.3. Point Cloud Commands

Command	Alias	Description
IMPORTPOINTCLOUD	IPC	Import point cloud file (LAS, LAZ, XYZ/CSV/TXT, PTS/PTX, PLY, E57). Opens a file dialog, reads points, builds octree, creates .iqpc cache.
ATTACHPOINTCLOUD	APC	Attach an existing .iqpc cache file without re-importing.
EXPORTPOINTCLOUD	EPC	Export point cloud to file. Supported formats: LAS, LAZ, XYZ, PTS, PLY, E57. Runs in background with progress.
PCCLIP		Elevation clip for point clouds. PCCLIP <zmin> <zmax> enables clipping to the specified Z range. PCCLIP OFF disables. PCCLIP alone shows current state.
PCSECTION	PCS	Create a point-cloud section (vertical or horizontal cut) as a persistent CAD entity. Prompts for kind, two pick points, slab thickness, Z-range mode, and section name. See Civil → Point Cloud Sections for the full workflow.
PCSECTIONVIEW	PCSV	Open the floating viewer for a selected section entity. Multiple sections can have viewers open simultaneously; each viewer auto-refreshes when the underlying section changes.
PCSECTIONTRACE	PCST	Run line-tracing on a section. Three modes: None (clear cache), Simple (PCA + Douglas-Peucker), Manhattan (orthogonal-axis snap on top of Simple). Tolerance defaults to 2 cm. Equivalent to clicking Trace in the viewer toolbar.
PCSECTIONCOMMIT	PCSC	Flatten a section’s traced polylines into the drawing at a picked insertion point with optional rotation and section label. Each commit produces an independent copy; committed geometry does not auto-update when the source section changes.
PCSECTIONS	PCSS	Open the modeless Point Cloud Sections Along Alignment viewer. Supports Ground mode (planimetric slab filter) and Tunnel mode (angular-bin filter around the alignment center — the retired standalone Tunnel Section Viewer is subsumed here). Shared toolbar controls: Plane combo (Vertical / Perpendicular) and Absolute Z toggle. Generate sheet… places the results on a grid TAECC_PointCloudSectionSheet entity via canvas pick; tunnel sheets carry a SheetKind discriminator and store tunnel filter parameters for re-sampling. See Civil → Point Cloud Sections Along Alignment.
PCGROUND	PCG	Slope-based ground classifier for a loaded point cloud (marks LAS class 2 ground points).
PCSURFACE	PCSURF	Build a surface from a point cloud (filter by classification, voxel decimate).
PCSECTIONSHEETSTYLES	PCSSS	Edit point-cloud section sheet styles.
PCELEVTRACK	—	Toggle the point cloud Elevation Tracker overlay — a live Z readout of the nearest point in every visible point cloud under the cursor. Shares the surface tracker’s overlay box. See Elevation Tracker.

8.1.4. Drone Commands

Command	Alias	Description
DRONESURVEY	DSV	Open the Drone Survey workspace. Load a GeoTIFF DEM or build one from LAS or LAZ, drape an orthophoto, pick points, breaklines and boundaries, sample a regular or low-pass grid, build a TIN and contours, and send them into the drawing. Named sessions are stored in the IQZ. Requires the Drone module. See Drone Survey.

8.1.5. Scripting & Automation

Command	Alias	Description
SCRIPT	SCR	Run a text script file of commands. Invoke SCRIPT with no arguments to open a file picker (*.scr), or SCRIPT <path> to load a specific file directly (relative paths resolved against the working directory; quotes around paths with spaces are tolerated). Also reachable from Tools → Run Script…. File format — one input per line, fed to the dispatcher as if typed at the prompt. Lines beginning with ; are comments (leading whitespace allowed). Blank lines act as Enter, which repeats the last command — same as AutoCAD’s empty-Enter behaviour. No space-as-Enter, no LISP, no DIESEL. Typical drawing pattern: LINE 0,0 @10,0 CIRCLE 20,0 25,0 Three sample scripts ship under samples\scripts\ — hello.scr (single-shot view commands, smoke test), setup_view.scr (reset to north-up zoomed extents), and draw_demo.scr (LINE + CIRCLE driven by typed coordinates).
PYTHON	PY	Run a Python script file (.py) in the embedded interpreter.
PYEVAL	—	Evaluate a Python expression and print the result.
PYLOAD	—	Load a Python module (session-resident).
PYSCRIPTS	—	List registered Python commands.
PYPIP	—	Run pip against the bundled Python (e.g. PYPIP install <pkg>).
PASCAL	PAS	Run a Pascal Script file (.pas).
PASEVAL	—	Evaluate a Pascal Script expression.
PASLOAD	—	Load a Pascal Script module (session-resident).
PASSCRIPTS	—	List registered Pascal Script commands.
BLADE	BLADERUNNER	Open the Blade Runner script editor.
PLUGINS	PLUGINMANAGER	Open the Plugin Manager dialog.