EXFO OTDR 2 - Manual (Page 80)

Customizing Your OTDR
72 OTDR
Customizing the Acquisition Distance Range Values
3. From the Range list, select the value you want to modify.
4. When the value becomes highlighted, enter the new value.
5. Tap OK to return to the main window.
Note: You can revert to factory values by pressing the Revert to Factory Settings
button.