Furuno FCR-2107 Operator's Manual page 254

8. Manual Updates
The example below shows how to set position for a point.
This method is also applicable to insert or append new points for existing chart features.
1) Activate Position Edit.
2) Insert a point with
left mouse button pushed.
The example below shows how to define an area for an existing chart feature.
1) Activate Position Edit.
2) Choose
"Set Center".
8-10
3) Change lat and lon if necessary.
Choose digit with cursor and
push thumbwheel and then spin
it change digit.
3) Place cursor on requred point
and push left mouse button.