This is where you enter details about the dimensions of the map image.  The map size is entered as width and height in millimeters.

Normally, Condes retrieves the dimensions directly from the map file, but occasionally this information is missing from the map file. 

If there is no dimensions information in the map file, you can enter the values manually.

If the dimension values are not correct, the map size is incorrect and co-ordinates are not correct - the map is then printed at a wrong scale, and calculated course lengths are incorrect.