Leica GPS1200 Series Technical Reference Manual page 415

Config...\Survey Settings...
IF
a ring buffer is to be deactivated
the raw data on a deactivated ring
buffer is to be deleted
the screen is to be quit
THEN
select the desired <Buffer No.:>. STOP (F3).
select the desired <Buffer No.:>. DEL (F4).
ESC.
GPS1200 415