Preview panel: five shortcuts (Spacebar, Shift+Spacebar, Numpad 0, Shift+Numpad 0,
Alt+Numpad 0) each with saved options (include video/audio/overlays/layer controls, loop,
cache before playback, range incl. play around current time, play from, frame rate, skip,
resolution, full screen, play cached frames, move time to preview time), persisted in
prefs; playback.settings.get/set; the playback loop follows the preview plan.
Align panel: layer.align {edge, to} and layer.distribute {mode} engine commands (bounds
through transform and parents, one undo step); Align Layers to dropdown and Distribute row.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>