功能一览
- A frame-snapped multi-track timeline — scrub the ruler, drag clips, split at the playhead
- A live preview canvas with the project frame size and a safe-area guide
- Transport controls — play, pause, stop, skip and playback speed
- A clip inspector for start time, duration, trim and opacity
- Undo and redo across the last 50 edits
- Export presets that set the frame size, frame rate and safe area