Garmin eTrex Legend Tutorial page 7

Before Anything Else, Set the Coordinate System
1. Navigate to Main Menu
2. Select 'Setup' 3. Select 'Units'
with page button
4. Change units
In 'Position Format' select the coordinate system you're using. For example,
UTM UPS for UTMs (PCS) or hddd.ddddd° for decimal degrees (GCS).
After change Position Format, select your Map Datum. For UTM UPS, you
likely want NAD 83. For hddd.ddddd, you likely want WGS 84.
The coordinate system is now set. You do not need to do anything extra to
save the settings – simply navigate to the next page you need with the page
button.