Garmin G900X Pilot's Manual page 205

GPS NAVIGATION
3) Turn the small FMS Knob to begin selecting the desired identifier, location, etc.
4) Press the ENT Key.
5) The cursor is now flashing on 'ACTIVATE?'. If no altitude constraint or course is desired, press the ENT Key to
activate. To enter an altitude constraint, proceed to step 6.
6) Turn the large FMS Knob to place the cursor over the 'VNV' altitude field.
Altitude Constraint
Figure 5-41 Entering Altitude Constraint
7) Turn the small FMS Knob to enter the desired VNV altitude.
Altitude Label
Figure 5-42 Selecting Altitude Mode
8) Press the ENT Key. The option to select MSL or AGL is now displayed.
9) Turn the small FMS Knob to select 'MSL' or 'AGL'.
10) Press the ENT Key. The cursor is placed in the 'VNV' offset distance field.
190-00726-00 Rev. A Garmin G900X Pilot's Guide 5-47