Trigger Type: Select a trigger type by pressing this submenu key to toggle among No Trig, GPS, or Ext. The active state is underlined on the face of the submenu key.

Ext Trigger Polarity: Press this submenu key to toggle either Rising or Falling polarity of external trigger.

Tau Offset: Press this submenu key to add an offset (5 sec is the maximum offset that can be entered) to the current Tau value.

Back: Press this submenu key to return to Setup Menu.