Launch Quicktime Pro.
Click File/Open File...
Navigate to the file you want to edit
Once the movie is loaded you need to set the
IN and OUT points for your clip. Set the playhead
where you want the clip to start and press "i" on
keyboard. This sets the "IN" point. Then move the
playhead to the spot in the video where you want
the clip to end and press "o" on your keyboard.
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