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Set the default duration for transitions in Final Cut Pro for Mac
If you find you often want to change the length of your transitions to last a specific number of seconds, you can change the default duration to the duration you use the most.
Tip: Adjust the default duration before applying a transition to many clips at once.
In Final Cut Pro, choose Final Cut Pro > Settings, or press Command-Comma (,), then click Editing.
Use the Transition value slider to set the duration, in seconds, of all transitions you add to the timeline.
You can adjust the duration of a transition after it’s in the timeline.
Note: Some transitions have a fixed duration and are not affected by this setting.
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