This is a quick reference for keyboard and mouse shortcuts.
Ctrl+Shift+P: Command palette.Esc: Cancel/exit active tool, clear selection, exit object edit.Delete: Delete selection.Backspace: Clear current numeric input buffer.Enter: Commit current numeric input buffer.Ctrl+Z: Undo.Ctrl+Y or Ctrl+Shift+Z: Redo.L: Hotspot -> Construction Line -> Line -> Polyline -> Double Line -> Rectangle -> Surface Rect -> Mesh -> Quad -> Circle -> Hotspot.D: Linear Dimension -> Screen Text -> Vectorial Text -> Linear Dimension.O: Line Offset -> Push/Pull (Extrude) -> Extrude-Swipe -> Plane Section -> Line Offset.M: Move -> Rotate -> Scale -> Stretch -> Rotate-Stretch -> Copy Multiple -> Planar Rotate Multiple -> Helicoidal Rotate Multiple -> Move.Select, pressing L, D, O, or M starts the corresponding cycle from its first tool.Line: Enter finishes the current chain, Esc exits to Select.Construction Line: Enter clears current segment draft, Esc exits to Select.Polyline / Double Line: Esc cancel, Enter finalize, Backspace remove last segment.Hotspot add pick mode: L enters from Select/cycle, second click places hotspot, Esc cancels.Wall: Enter finishes current wall chain, Esc exits to Select.Slab / Stair / Add Hole / Window Frame / Door Frame: Enter resets current draft, Esc exits to Select.Delete in architecture groups removes selected hole contours (wall holes), not generated wall mesh faces.Ctrl+O: Create object prototype from selection.T: Add axis guide at current snap point.G: Add grid guide at current snap point.Ctrl+L: Run cleanup on the model.Ctrl+N: Show numeric input popup at cursor.0-9, ., -: Direct numeric input while a tool is active.Esc, Delete, tool shortcuts) apply when the pointer is over the canvas.Ctrl+G: Group (create object prototype) from selection.Ctrl+Shift+G: Ungroup selection.Ctrl: Toggle copy mode for Move/Rotate/Scale (and any tool that supports it).