Leupold GX Series Operating Instructions Manual page 17

FUNCTION 3: ALTITUDE INPUT (GX-II ONLY)
Altitude is one of the factors used to determine
TGR ranges; inputting the local elevation/altitude
will increase the accuracy of your TGR measurement .
The default altitude setting is 1000 ft, and will be
shown in the lower portion of the display . After
activating TGR, the last saved current temperature
will be displayed, followed by the last saved current
altitude . Press POWER to set the altitude to match current conditions; each
depression of POWER will increase the altitude setting by 500 feet . The total
range of available altitude settings is 0 to 9999 feet . Press MODE to save your
input and move to the next function .
How do I manually Input tHe cuRRent elevatIon? (GX-II only)
1) Press POWER to activate the rangefinder .
2) Press and hold MODE for at least 1 second to enter the Quick Set Menu
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