Garmin GPS II Owner's Manual page 43

Waypoint Comments
Each waypoint stored in the GPS II has a user-defined 16-character comment
field. The default comment is the UTC (or Greenwich mean time) date and time of
the waypoint's creation.
To change or add a comment:
1. Highlight the 'comment' field.
2. Press ENTER (Fig. 37a).
3. Make changes or enter a comment (Fig. 37b).
4. Press ENTER.
REFERENCE
Fig. 37a
Fig. 37b
37