Help for the Heroes 4 Map Editor.

I wonder how to determine coordinates on the map? In Heroes of Might and Magic III, it's no problem, but in Heroes of Might and Magic IV, to point out a problem in a specific location, you need to describe a part of the map. Okay, I figured it out – in Heroes of Might and Magic III, the editor has floating numbers. The only problem is that the coordinate grid is diagonal, which makes it difficult to pinpoint.