Ripple Edit
In normal operation, if you delete a Part (or a section of a Part) from the timeline, all other Parts on the timeline remain in position, and a space is left where the deleted Part was. If you'd like the Parts ahead of the deleted region to move backward to fill that space, say, when editing spoken word content where gaps are undesirable, enable Ripple Edit mode. To do so, press the Ripple Edit button in the toolbar, which looks like this:
Apart from automatically filling in gaps when cutting or deleting content, Ripple Edit also introduces a sort of "displacement" behavior when editing. If you copy a Part and paste it in the middle of another, instead of replacing (or overlapping) that section of the target Part, the target Part is split at the edit point, and moved forward in the timeline, to make space for the pasted Part. If you move a Part to the start point of another Part, instead of replacing or overlapping the content below, the two Parts simply switch places.
Similarly, if you trim the end of a part to change its length, the Parts downstream move to maintain their relative position to the end of the trimmed Part. This behavior extends to other editing operations, such as Crop to Content and Nudge/Nudge Back.
