Left: Media browser — drag or select video/image/audio/PDF to add as layers to the current scene.
Center‑left: Scene list — select a card to send to Preview; double‑click or Enter to cut to Program.
Center: Preview and Program windows; below them, CUT / MIX / FTB and playback controls.
Right: Layer panel (order, visibility, loop per layer), Mixer, transition duration, etc. Bottom sliders adjust scene card W and H.
Menus: File (New/Open/Save), Edit (Hotkey Editor), View (Mixer, etc.), Settings, Help.