JRC JMA-610 Series Instruction Manual page 89

Deleting a mark or vertex of a line (Delete Vertex)
With regard to the created user map, a vertex is deleted individually from a mark or line.
Procedures 1 Press [MENU] key.
Select
Select
Select
Select
2 Put the cursor on the mark or vertex of a line, and press [ENTER] key.
The vertex of the selected mark or vertex of a line is deleted.
All of the lines drawn by joining two points are deleted.
To delete another mark or vertex of a line, repeat procedure 2.
3 Press [ MENU] key.
Menu will be closed.
(Example)
8.Next and press [ENTER] key.
4.NAV Information and press [ENTER] key.
1.Edit User Map and press [ENTER] key.
6.Delete Vertex and press [ENTER] key.
The vertex to be deleted
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3.6 DISPLAY USER MAP
3