What version are you running? have you checked the help file, it explains how to do it. Right click on any clip (make sure you are right clicking on a clip not an alert)...you can also trim a clip before export in the playback window using the red and green arrows.
ver 4.3.5
I used the green and red arrows to show the part I wanted to backup.
The video clip was done but has only one frame besides I chossed a video of 2 minutes
ver 4.3.5
I used the green and red arrows to show the part I wanted to backup.
The video clip was done but has only one frame besides I chossed a video of 2 minutes