GE Spacemaker PNM1871 Owner's Manual page 26

Other features your model may have.
26
Timer
Timer operates as a minute timer and can be used
at any time, even when the oven is operating.
Press TIMER .
1
2 Enter time you want to count down.
Press TIMER to start.
3
To pause the countdown, press TIMER .
When time is up, the oven will signal. To turn off
the timer signal, press TIMER .
NOTE: The timer indicator will be lit while the timer
is operating.
To cancel the timer, press and hold the TIMER pad
for 2 seconds.