Panasonic LP-310 Operation Manual page 60

b. Input the counter function character.
Refer to "3-3-3 Input of Function Character" (P.90) for details.
Press
1
Adjust the cursor to the first line (01), and press
2
EDIT
* Re-adjusting the cursor to the first line (01) and
then pressing (double-clicking) the same cursor
performs the same operation.
Press [COUNTER].
3
Set "4" to the [Figure].
4
Set the display digit using
REFERENCE
60
.
.
button.
The display digit can be set among 1 to 8.