Sync and Video : Working with Synchronization : Using the Trim Tools in Spot Mode

Using the Trim Tools in Spot Mode
You can use the Spot dialog to trim your clips, including start/end/duration times and referencing incoming timecode addresses. If you click a clip with any of the Trim tools in Spot mode, the Spot dialog will appear, allowing you to enter a value in the Start or End and Duration fields to specify exactly where you want to trim the clip’s beginning or end. Use this to edit the length of a clip to correspond to a particular visual “hit point.”
Trimming a clip that contains a sync point (see Identifying a Synchronization Point) does not affect the SMPTE location of the sync point, unless the clip is trimmed past the sync point.