Furuno FEA-2107 Operator's Manual page 231

Example of how to set new position for a point
The method is also applicable to insert or append new points for existing chart features.
1) Activate Position Edit.
2) Insert point with
left mouse button.
Example of how to define a new center point for an existing chart feature
1) Activate Position Edit.
2) Select
"Set Center".
3) If necessary change lat
and lon position. Place
cursor on digit, push
thumbwheel and then
roll thumbwheel.
3) Place cursor on new required center
point and push left mouse button.
10. Manual Updates
10-23