GE USM 36 Series Technical Reference And Operating Manual page 84

5 Operation
To be able to use the arrow keys as function keys, you
have to choose the corresponding setting.
– Switch to the second operating level.
– In the function group CONFIG3, select the function
F# KEY.
– Select the setting FUNCTION.
– In the function group CONFIG3, select the function
FUNCTION 1 to assign the function key F1.
– Choose the required function for the function key F1.
– Choose the functions for the other function keys in
the same way.
5-8 Issue 2 (12/2013)
Assignment of function keys
USM 36