# KulmanLab CAD — Command Reference

> Complete reference for every command in KulmanLab CAD, a free browser-based CAD tool for drawing, editing, and exporting DXF files.

KulmanLab CAD runs entirely in the browser — no installation required. This documentation covers all available commands grouped by category.

## App

https://kulmanlab.com/

## Docs index

https://kulmanlab.com/docs/

## Source code

https://github.com/volodymyr4509/kulmanlab

## Shapes

- [Line](https://kulmanlab.com/docs/commands/line): Draw a straight line between two points. Chains end-to-end automatically. Supports angle locking and exact length input.
- [Polyline](https://kulmanlab.com/docs/commands/polyline): Draw a multi-segment open path stored as a single LWPOLYLINE entity.
- [Rectangle](https://kulmanlab.com/docs/commands/rectangle): Draw an axis-aligned rectangle by picking two opposite corners.
- [Circle](https://kulmanlab.com/docs/commands/circle): Draw a circle by center point and radius.
- [Arc](https://kulmanlab.com/docs/commands/arc): Draw an arc by picking three points (start, a point on the arc, end).
- [Ellipse](https://kulmanlab.com/docs/commands/ellipse): Draw an ellipse by center, one axis endpoint, and a ratio.
- [Text](https://kulmanlab.com/docs/commands/text): Place a multi-line MTEXT label — click a position, type in the popup editor, press Escape to commit. Double-click any existing label to reopen the editor.
- [Spline CV](https://kulmanlab.com/docs/commands/spline-cv): Draw a spline by placing control vertices (B-spline approximation).
- [Spline Fit](https://kulmanlab.com/docs/commands/spline-fit): Draw a spline that passes through every clicked point.

## Edit

- [Move](https://kulmanlab.com/docs/commands/move): Move selected entities to a new position using a base point and destination.
- [Copy](https://kulmanlab.com/docs/commands/copy): Copy selected entities to one or more positions.
- [Rotate](https://kulmanlab.com/docs/commands/rotate): Rotate selected entities around a base point by a specified angle.
- [Mirror](https://kulmanlab.com/docs/commands/mirror): Mirror selected entities across a two-point line.
- [Scale](https://kulmanlab.com/docs/commands/scale): Scale selected entities around a base point by a numeric factor.
- [Delete](https://kulmanlab.com/docs/commands/delete): Remove selected entities from the drawing.
- [Trim](https://kulmanlab.com/docs/commands/trim): Trim a line segment at its intersection with another entity.
- [Extend](https://kulmanlab.com/docs/commands/extend): Extend a line to the nearest boundary intersection.
- [Offset](https://kulmanlab.com/docs/commands/offset): Create a parallel copy of a line or polyline at a given distance.
- [Fillet](https://kulmanlab.com/docs/commands/fillet): Round a corner between two lines with a tangent arc.
- [Chamfer](https://kulmanlab.com/docs/commands/chamfer): Cut a straight diagonal corner between two lines or polylines.
- [Undo](https://kulmanlab.com/docs/commands/undo): Undo the last action.
- [Redo](https://kulmanlab.com/docs/commands/redo): Redo the last undone action.

## Markup (Dimensions & Leaders)

- [Leader](https://kulmanlab.com/docs/commands/leader): Draw a multileader annotation with an arrowhead and text label.
- [Leader+](https://kulmanlab.com/docs/commands/leader-add): Add an extra arm to an existing multileader.
- [Leader−](https://kulmanlab.com/docs/commands/leader-remove): Remove an arm from an existing multileader.
- [Dimension Linear](https://kulmanlab.com/docs/commands/dim-linear): Add a horizontal or vertical dimension between two points.
- [Dimension Aligned](https://kulmanlab.com/docs/commands/dim-aligned): Add a dimension aligned to two points at any angle.
- [Dimension Continue](https://kulmanlab.com/docs/commands/dim-continue): Chain a new dimension from the endpoint of the last dimension.
- [Dimension Radius](https://kulmanlab.com/docs/commands/dim-radius): Add a radius dimension to a circle or arc.
- [Dimension Diameter](https://kulmanlab.com/docs/commands/dim-diameter): Add a diameter dimension to a circle.
- [Dimension Angular](https://kulmanlab.com/docs/commands/dim-angular): Add an angular dimension to two lines, an arc, or a circle.

## Layer

- [LayerMakeCurrent](https://kulmanlab.com/docs/commands/layer-make-current): Set the active layer to match a clicked entity's layer.
- [LayerMatch](https://kulmanlab.com/docs/commands/layer-match): Reassign selected entities to match the layer of a source entity.
- [LayerIsolate](https://kulmanlab.com/docs/commands/layer-isolate): Freeze all layers except those of the selected entities.
- [LayerUnfreezeAll](https://kulmanlab.com/docs/commands/layer-unfreeze-all): Unfreeze all layers in one step.

## Layouts & Viewports

- [ViewportRectangle](https://kulmanlab.com/docs/commands/viewport-rectangle): Create a viewport in a paper layout by picking two opposite corners.
- [ViewportCopy](https://kulmanlab.com/docs/commands/viewport-copy): Duplicate a viewport to a new position, preserving scale and model view.
- [PageManager](https://kulmanlab.com/docs/commands/page-manager): Edit paper size, orientation, and drawing unit scale for the active layout.

## Navigate

- [Pan](https://kulmanlab.com/docs/commands/pan): Click and drag to move the viewport.
- [Zoom In](https://kulmanlab.com/docs/commands/zoom-in): Zoom the viewport in.
- [Zoom Out](https://kulmanlab.com/docs/commands/zoom-out): Zoom the viewport out.
- [Fit](https://kulmanlab.com/docs/commands/fit): Fit all entities into the viewport.

## Interface

- [Grid & Snap](https://kulmanlab.com/docs/interface/grid-snap): Toggle a reference grid and lock the cursor to grid points while drawing.
- [Linetype](https://kulmanlab.com/docs/interface/linetype): Set the dash pattern applied to newly drawn entities (ByLayer, Continuous, or named linetypes).
- [Lineweight](https://kulmanlab.com/docs/interface/lineweight): Set the stroke width applied to newly drawn entities (ByLayer, Default, or 0.00–2.11 mm).
- [Text Editor](https://kulmanlab.com/docs/interface/text-editor): Rich-text popup editor for MTEXT labels — bold, italic, strikethrough, per-character font and height, multi-line, word wrap, and full cursor navigation.
- Coordinate Entry: At any point prompt, type an X value, press `,`, type a Y value, press Enter to place an exact position. Works in all drawing and editing commands.

## Measure

- [Distance](https://kulmanlab.com/docs/commands/distance): Measure the straight-line distance between two points.
- [Angle](https://kulmanlab.com/docs/commands/angle): Measure the angle between three points.

## Style

- [Match Properties](https://kulmanlab.com/docs/commands/match-properties): Copy color, layer, linetype, and other properties from one entity to others.

## File

- [Import](https://kulmanlab.com/docs/commands/import): Open a DXF or JSON drawing file.
- [New File](https://kulmanlab.com/docs/commands/new-file): Start a fresh blank drawing.
- [Files](https://kulmanlab.com/docs/commands/files): Browse and restore recent drawings from browser storage.
- [Print](https://kulmanlab.com/docs/commands/print): Export a selected drawing area as an image or PDF.
- [Export](https://kulmanlab.com/docs/commands/export): Download the drawing as DXF or JSON.
- [WipeStorage](https://kulmanlab.com/docs/commands/wipestorage): Clear all drawings from browser storage.

## Recovery

- **?reset URL parameter**: If the app crashes on every startup (e.g. after working with extremely large coordinates), navigate to `https://kulmanlab.com/?resetKulmanLocalStorage` to clear all IndexedDB data and start fresh — no terminal access required. The parameter removes itself from the URL automatically.