Editing the Coordinate Label by the Feature Guide
Right-click on the Coordinate Label name in the Feature Tree, and select Edit Feature.
The Feature Guide will appear, automatically open to Required Step 1. You now return to the same situation in which you created the Coordinate Labels and you may pick new points or unpick the points of existing Coordinate Labels as required.
Press OK
or Apply 
in the Feature Guide to complete the function.
See also: