Garmin GNS 530 Pilot's Manual And Reference page 141

Deleting all user waypoints from memory:
1) Select the User Waypoint List, as described in
this section.
2) Press the MENU Key to display a menu for the
User Waypoint List (Figure 7-50).
Figure 7-50 User Waypoint List Page Menu
3) With 'Delete All User Waypoints' highlighted,
press the ENT Key.
4) A 'delete all waypoints' confirmation window
is displayed (Figure 7-51). With 'Yes?'
highlighted, press the ENT Key to delete all
user waypoints from memory.
Figure 7-51 Delete All Waypoints Window
190-00181-00 Rev. G
GNS 530(A) Pilot's Guide and Reference
SECTION 7
WPT PAGES
7-25