Change the movie duration
Set the ending and check every track.
The movie's ending needs to include the content you want to show, including recordings, titles, and audio.
Change the duration
Click the duration field next to the current playhead time at the top of the timeline. Enter the number of seconds you need and press Return. For example, enter 10 for a ten-second movie. Zoom out when you need to inspect the full timeline.
Review the end of every track: camera movement, device movement, screen contents, overlays, and audio. Shortening a camera move is different from shortening a screen recording or the whole movie.
Leave time to read
A gap after a movement holds the camera or device still. A text or image overlay needs its own block to extend through that gap if it should remain visible.
Scrub to just before the movie ends, then play the last few seconds. Render a short sample to check that the final frame and audio ending feel intentional.