You can create editorial groups to preserve the relationship between timeline elements. For example, if you have a video clip with two tracks of audio, you can create a group for them. When you edit one segment that is part of a group, all segments in the group are edited in the same way. If your group becomes out of sync, a visual cue is displayed on the timeline, and tools are available to help you resync the elements.
Group.
The group is created. File names on the elements are underlined to indicate group status. By default, Link Selection is enabled in the Group settings in the Timeline Task menu. This signifies that the elements in the group are linked, and are able to be edited together.
If an editing operation removes the sync for a track in a group, a red plus (+) or minus (-) symbol appears in the element with the amount of frames that are out of sync to the left (-) or right (+).

You can attempt to manually fix the sync issue by editing the out-of-sync element. In this case, make sure that Link Selection is disabled in the Group settings in the Timeline Task menu. Once you have resynced, you can enable Link Selection again.
You can either resync the elements or reset the offsets, creating a new sync relationship based on the current position of the segments.
The element is resynced, if possible, and the out-of-sync symbol disappears.
When you delete an editorial group, the sync is removed from all elements that were part of the group. You can also temporarily disable an editorial group.
Ungroup.