EXFO OTDR 2 - Manual (Page 78)

Customizing Your OTDR
70 OTDR
Selecting the Distance Units
To select the distance units for your display:
1. From the button bar, tap User Preferences.
2. From the User Preferences window, select the General tab.
3. From the Distance unit list, select the item corresponding to the
desired distance units.
4. Tap OK to return to the main window.
You return to the main window and the newly selected distance unit
appears everywhere units are used.