Operating Instructions and Installation Instructions

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Track Smoothing
This is a factory setting on the GPS Setup menu that should always be
left on. When stopped or traveling at slow speeds (such as walking or
trolling), Track Smoothing prevents wandering of trails, the steering
arrow, compass rose and a map in track-up mode.
Track Smoothing highlighted on the GPS Setup menu.
Trail Options
There are several options you can use with trails. Some affect all trails,
other options can be applied to a particular trail. You can change the
way trails are updated, display or hide trails, create a new trail, delete
a trail and edit a trail's name, color, pattern and visibility.
The Trails Menu.