You can move the border of the current slide on the timeline and keep syncing of the next slides with audio and video clips.
To do it, enable the Pin Clips option:
- Hold down the Shift key and move the slide border on the timeline.
Clip Volume Control
When you enable this option, you will be able to adjust the volume of any audio or video clip in your presentation.
To enable the option:
- Click the Clip Volume button on the toolbar.