Final Cut Pro X: Show detailed trimming feedback
For more accurate visual feedback on edits involving contiguous or connected clips, you can see a “two-up” display in the viewer. For example, for a simple ripple edit, this two-up display shows the end point of the left clip and the start point of the right clip.
Choose Final Cut Pro > Preferences, or press Command-Comma (,).
In the Timeline section, select the “Show detailed trimming feedback” checkbox.
The two-up display appears in the viewer whenever you use a supported edit type or when trimming in the precision editor.
Tip: You can use the Option key to change the detailed trimming feedback display on the fly. If detailed trimming feedback is enabled, press the Option key to disable it. If detailed trimming feedback is disabled, press the Option key to switch the view between the end point of the left clip and the start point of the right clip.