Suggestion to a great app

I would like to edit the co-ordinates when I find a survey marker on my property. The map I received from my surveyor has the co-ordinates listed so I would like to substitute the co-ordinates issued by this app with the more accurate co-ordinates from my surveyors map. I think this would also help me in finding markers on my property as well as creating a more accurate map.

Yatessw about AGRIplot, v1.1.3