Porsche 911 Carrera Owner's Manual page 125

Push operating lever forward. The stopwatch
displays continue the timing.
The on-board computer display returns to the "Stop
timing/Intermediate time" selection. You can stop
the stopwatch or measure an intermediate time.
Resetting the time
After timing has been stopped, the on-board
computer display changes to the "Continue/Reset"
selection.
Select "Reset" with the operating lever.
Push operating lever forward. The display
returns to the "Start timing" selection. The
stopwatch displays in the instrument panel and
the on-board computer are reset to zero.
Controls, Instruments
123