GE SpacemakerXL JVM1542 Owner's Manual page 26

Otherfeaturesyourmodel may have.
Surface Light
Press SURFACE LIGHTonce
for bright light, twice for
the night light or three times to turn the light off.
VentFan
The vent fan removes steam and other vapors from
surface cooking.
Press VENT FAN once for high fan speed, twice for
low fan speed, or a third time to turn the fan off.
The vent fan operates automatically during
microwave cooking.
Custom
The CUSTOM pad allows you to save your
most
frequenfly used settings.
To set and save a setting:
Press the CUSTOM pad.
Set the amount of cooking time.
Set the power level, if desired. (Full power will
automatically be set if you do not change it).
Press
START.
Your custom setting will be remembered for future
use. Just press CUSTOM, then press START.
26