Drag units to move • click to select • R rotate • arrows nudge • Del remove.
Per-unit: ⊖ hide/show • ⎘ duplicate •
⟳ rotate. Ctrl/⌘+Z undo, ⇧ to redo. Export/Import save & load all tabs as JSON.
Switch Plan / Front / Side to position units in each axis — drag in Front/Side to set height off the floor.
Units turn red when they clash or leave the space; selecting one shows
guides for the clear space to the nearest unit (blue) or the space wall (amber). 3D is a free-orbit preview.