If a point is not able to be edited then it may be part of a curve. If the point is in a curve then you can only edit the description. If you change the properties of a point (i.e. - northing, easting, elevation, etc.) that is associated with a curve then you change the curve itself. If you want to edit the point, remove the point from the alignment containing the curve, make your edits and then insert the point back in the alignment.
↧