EXFO OTDR 2 - Manual (Page 60)

Testing Fibers
52 OTDR
Setting the Automatic Acquisition Parameters
4. If you want to keep the auto-settings activated once an acquisition is
done, proceed as follows:
4a. Tap the button.
4b. Under Advanced Parameters, select the Remain in
Auto-Settings box.
4c. Tap OK to return to the main window.