Here are the instructions that are found in the manual and on Leupolds website for the manual:
YARDS/METERS OUTPUT
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 2 seconds to
enter the Quick Set Menu.
3) Press and release MODE until the word Unit is shown in the upper display
4) While the word Unit is shown in the upper display,
press and release POWER as necessary to toggle
between yards and meters, shown in the upper
right portion of the display.
5) To save the changes and return to ranging mode,
press and release MODE.