| drag | move (snaps to edges, centers, gaps — hold Alt to disable) |
| shift-click | add/remove from selection |
| drag empty wall | marquee select |
| arrows | nudge ¼″ (Shift = 1″) |
| R | rotate 90° |
| L | lock / unlock |
| Ctrl+D | duplicate |
| Ctrl+A | select all |
| Delete | remove from wall (poster stays in library) |
| Ctrl+Z / Y | undo / redo |
| Ctrl+scroll | zoom, middle-drag to pan |
| dbl-click poster | edit its hanging hardware |