Trim the Presentation
Do you want to edit you presentation to remove extra video at the beginning or end?
To Trim Your Presentation
After you finish recording, click Trimming to access the trimming tools.
Move the playhead to the location you want to set as the beginning of the presentation and click the Set presentation start button.
Move the playhead to the location you want to set as the end of the presentation and click the Set presentation end button.
The area of the timeline in red is cut from the presentation. Once you submit or save the recording, you lose this part of the recording.
If you want to cancel the trim, click Cancel trim (the red X button.)
See also
What Happens to the Presentation After I Submit It?