System Configuration : Preferences : Processing Preferences : AudioSuite Section

AudioSuite Section
Default Handle Length
The Default Handle Length options let you set the default length for AudioSuite and clip gain handles.
Whole File
When enabled, AudioSuite and clip gain rendering renders the whole file referenced by the selection or clip.
Length
This setting lets you specify the default Handle Length (from 0.00 to 60.00 seconds) for AudioSuite and clip gain rendering. AudioSuite and clip gain rendering renders the selection plus any additional available audio up to the specified Handle Length.