Managing Your Work Environment > Setting Preferences > Timeline Preferences >
Batch FX

Use these preferences when working with Batch FX.

Interactive Max field
  Enter the number of seconds that you want the system to attempt a render when previewing Batch FX.
Add Axis On Matte Outup button
  Enable to have an Axis soft effect automatically added to the timeline when you output a matte from the BFX output node to the timeline.