Choose Edit > Trim to remove all data outside the current selection.
Select the data you want to keep. For more information, see "Selecting data using the mouse."
Choose Edit > Trim.
This command does not copy sound data to the clipboard.
Unselected channels in a multichannel file are unaffected by the trimming operation.
At least one event must be selected to use the Trim command in event-editing mode. For more information, see "Event-based editing."
Trimming is not available in envelope-editing mode. For more information, see "Envelope Mode."