Leupold GX-3i3 Operating Instructions Manual page 31

3) The last saved Altitude will be flashing in the
bottom portion of the display. If you wish
to input an Altitude other than the one shown,
proceed to step 4. To save the shown altitude
and return to ranging mode, let the unit sit idle
for at least 30 seconds until an automatic
power-down occurs, or simply press and hold
MODE for at least 2 seconds. To continue through the Quick Set
Menu and manipulate another feature, press and release MODE
until the appropriate mode is displayed.
4) Press POWER to begin incrementing through the altitude settings. The
default setting is 1000 feet. Pressing POWER will increment through a
range of 0 feet to 9,999 feet in 500 foot increments. When the
appropriate altitude is displayed, you have completed the input process for
setting up the Temperature and Altitude at which the striking distances
were measured. To save the changes and return to ranging mode, let the
unit sit idle for at least 30 seconds until an automatic power-down occurs,
or simply press and hold MODE for at least 2 seconds. To continue through
the Quick Set Menu and manipulate another feature, press and release
MODE until the appropriate mode is displayed.
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