JRC JMA-5206 Instruction Manual page 149

4 Deleting a continuous line or mark (Delete)
Procedures 1 Press [4] key while the Edit User Map Menu is open.
The navigation information deletion mode will be activated.
Delete will appear in the CURSOR mode field at the radar display button
2 Use the trackball to move the pointer to the vertex in a line or the mark
to be deleted, and press [ENT] key.
The selected line or mark will be deleted.
Note: A line drawn by joining two points is all deleted.
3 To delete another line or mark, repeat step 2.
4 Press [0] key when finishing the deletion of lines and marks.
The
operation mode, terminating the navigation information deletion mode.
(Example) Deletion of a vertex from a line
3.8 DISPLAY NAVIGATION INFORMATION
CURSOR mode at the upper right of the radar display will change to the general
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