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Timeline & Scenes

The timeline is where timing happens: visual tracks (V0, V1, … — higher tracks render on top), audio tracks (A0, A1, … with waveforms), a subtitle lane, and a scene strip when the project uses scenes.

Scene strip, visual track, audio waveform, and the subtitle lane
Scene strip, visual track, audio waveform, and the subtitle lane

Clip operations​

  • Trim — drag a clip's edges to change its enter/exit times (enterBegin/exitEnd in the JSON).
  • Split at playhead and merge with next — from the clip context menu.
  • Move — drag along the track or to another track (this changes the element's track, i.e. its z-order).
  • Context menu — Delete, Cut, Copy, Paste, Duplicate, and Convert to scene.
  • Track management — add or remove empty tracks with the +/− controls.

Fine-grained timing lives in the inspector's Timing tab (enter/exit, delay, and source trim for videos).

Transport & navigation​

Play/pause (Space), skip to start/end (Home/End), loop (L), mute (M), snap toggle, and the current/total time display. Zoom the timeline with the slider (8–400 px/s) or Ctrl+scroll; click or drag on the ruler to scrub.

When content extends past the project duration, a "content exceeds duration" warning appears with a one-click Fit duration fix.

Scenes​

The Scenes tab and scene strip manage scenes — self-contained segments with local timelines:

  • Add, reorder, and select scenes; each scene has its own duration (or auto-fit) and background color.
  • Scene transitions — pick from 51 effects with a duration slider (0.1–5 s); the editor previews the same xfade effects the API renders.
  • Convert to scene promotes timeline content into a new scene.

In image projects the timeline is hidden entirely.