Samyung NAVIS 5100 Instruction Manual page 57

 Edit waypoint by F key
 [Mark color, Course-Up, Waypoint]
 Delete waypoint data edited
At waypoint  Select blank number,
(by direction key) ,
 Move waypoint data to another number
Ex) In case move 'No.0014' to 'No.0005 Waypoint'
At waypoint  Move cursor to『No.0014』, Press
Press ( )
[Note]

At waypoint edit
+10steps.
(
( )
( ), (
[Waypoint]  Press to edit Waypoint
) (Overlap)  Select number to be deleted
)  Move to『No.0005』,
(
) move in - 10steps,
57
( ), ( ) move in