- Properties with an expression get an editor row in the timeline: Expression label,
enable (=) switch, pick whip, syntax-error warning, and a multiline code editor in the
time-graph area (commits on blur or Cmd/Ctrl+Enter via prop.setExpression).
- Expression pick whip: drag onto another property row -> prop.pickWhip (AE reference
expression). Parent pick whip in Parent & Link: drag onto a layer -> layer.setParent.
- Alt-click on a stopwatch starts with the property's own reference (transform.opacity).
- Timeline rows have variable heights; the empty-graph box-select area sits under the rows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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