One may add, redefine, or remove data points directly on map. A data point clicked in the list becomes red in both the basic and general view windows. Double clicking a data point on a map selects it in the list. It is not necessary to enter coordinates manually. Double clicking on the map assigns new coordinates.
New points are green and are appended to the list.
One can add data points from an appropriately formatted file. Deleted points are marked by a cross and withdrawn from the list.