When you want to adjust the cut between two clips, you can use either ripple edits or rolling edits. By using these tools, you can make adjustments in a single action. When you’re working in the Timeline in Trim mode, the clips affected by your edits appear in the Program Monitor side by side. In Trim mode, the Program Monitor helps you decide on the content you want to use by showing you the last frame of the clip that you’re trimming and the first frame of the next clip. Click and drag on the clip in the Timeline to make adjustments.
After you make your adjustment, there might be a gap in the Timeline from where you did the video trimming. Close this gap by highlighting it and doing a Ripple delete, which will close the gap and shorten the overall length of the sequence. Clicking the edit point between two clips with the Ripple Edit tool chooses a Ripple In or Ripple Out edit point selection, depending on the side of the edit point you click. If you use Control-click (Windows) or Command-click (Mac OS) on the edit point with the Ripple Edit tool, the cursor shows the Rolling Edit tool.
To maintain the overall length of a sequence, do a rolling edit. This adjusts two clips at the same time — shorten one and extend the next by exactly the same amount. Move the In point or Out point of a clip in a sequence to the playhead, without leaving gaps in the sequence.