You can control how long a scene or element goes!
Hover on the timeline and you’ll see a white vertical bar. Click on it and drag outward to add duration, and drag inward (toward the left) to shorten the duration. You can adjust the duration of a Caption element (upper tab) or the Background element (lower tab).
Be mindful of how long your total video is! Your social media video wants to be snippy and eye-catching so it can fit in with all of its friends in the internet playground :)
Also, 3.0 is very new, so we'd really appreciate your feedback going forward! Please let us know what you think here! Your insight helps us know which features we need to prioritize.