The Transitions are applied when a sequence from the Clip is inserted in the Movie. You can set the Duration of the Transition to any value between 2 frames and 6 second. The longer the Transition, the slower the Clip Sequence will be revealed.

Here's what you have to keep in mind when doing Transitions:

1. The Transition Duration must not be longer than the sequence you're adding to the Movie (the Selected Sequence).

2. You must leave enough time for the Transition before the Movie's Start Point. QuickEditor uses frames from the Movie that are located before the Movie's Start Point to process the Transition. With a Transition Duration set to 1.5 second, QuickEditor will need 1.5 second of Movie before the Start Point, otherwise it won't be able to process the Transition and will return an error.

3. The QuickTime compressor you chose will directly affect the picture quality of the Transition. Fade Transitions for instance don't look good when compressed with the 'video' compressor if the 'Key Frames every...' box is checked. They look better if the box is not checked or with the 'Animation' or 'Cinepak' compressors.