Work with marks
- Press A or choose Add / Remove Chapter Mark at the current source frame.
- Use F5/F6 or the chapter transport controls for previous/next mark.
- Clear all marks only when you intend to remove the complete chapter set.
Timeline display
Small red triangles and their vertical guide lines identify source chapter positions on the timeline/ruler. The main playhead is visually distinct so a nearby chapter does not obscure the current position.
Save and export
File > Save Chapter File writes the current mark set independently. Compatible containers can preserve chapters during video export; containers that cannot represent them report that policy rather than silently claiming chapter delivery.