Regrouping Clips
The Regroup menu command undoes the last Ungroup command and regroups all the individual clips as a clip group. This lets you ungroup a grouped clip, edit its underlying clips, and regroup it to continue working on higher-level composition and arranging.
To regroup a clip group:
1. Select any clip from the ungrouped clip group.
2. Choose Clip > Regroup.

Press Command+Option+R (Mac) or Control+Alt+R (Windows) to regroup selected clips that were formally part of a clip group.
If you used the Ungroup All command, the Regroup command recreates all previous nested clip groups.
3. If you regrouped an ungrouped clip group that was used more than once in the project, do one of the following when the Change All dialog opens.

Choose
Modify to apply your changes to all other instances of the same clip group.

Choose
Copy to create a copy and apply your changes only to the copied clip group.