Edit Modes and Tools : Using the Trim Tools
 
Using the Trim Tools
Trim tools provide clip, note, and data trimming functions. The following Trim tools are available:
Trim tool; also called the Standard Trim tool
Time Compression/Expansion Trim tool; also called the TCE Trim tool
Loop Trim tool
The Standard and Scrub Trim tools are only constrained by the boundaries of the whole-audio file referenced by the clip. The TCE Trim tool is only constrained by the maximum TCE amount when using the TCE Trim tool.