> Grouping Clips
> You can group a set of clips together to link them to one another temporally, which enables you to move them as a group in a single operation. This is useful when you have a sequence of clips arranged, and you want to preserve their relationship to one another.
> It’s also useful when you have a screencast clip and a corresponding iSight clip with video and/or voice-over. Because the iSight clip is on the same timecode, grouping the two makes it easy to keep them in synch with one another.
> To group a set of clips together, select the clips you want to group, and select Edit > Group or press Command-G.
> To ungroup them again, select the group, then select Edit > Ungroup or press Command-U.
> Note: ScreenFlow also supports nesting of clips—hiding nested clips in one master nest clip, to reduce timeline complexity and increase the ease of editing. For details, see Using Nested Clips.