Use Snap to Grid 
to force points to snap to positions according to the font grid spacing. Snap to Grid may be used to position points perfectly so that the same design elements on different characters line up correctly. For instance, if you have a satin border around all your characters, you can ensure that the curve around the ‘O’ and ‘Q’ is identical.
Use Snap to Grid when editing point of an area.
Snap to Grid is enabled when highlighted. Click to deselect.
Grid snap can be restrictive when designing SuperDesigns or unusual characters.