Nesting

Nesting collapses several clips, tracks, or layers into one compound clip that appears as a single block in the parent timeline, while its contents live in their own nested sequence you can open and edit. It is a way to manage complexity and apply operations to a group at once. Editors nest to apply a single effect, speed change, or transition across a multi-layer composite, to reuse a repeating montage as one element, or to tidy a busy timeline. The cost is reduced visibility, since the individual edits are hidden inside, and some adjustments (like certain audio routing or speed ramps) behave differently once nested. Used deliberately, nesting keeps projects organized and makes group-level changes fast instead of repetitive.