Zoom Adjustment

I am in need of having a more flexible zoom for the map. My problem is if I zoom out enough to make the Map Cursor lat/lon overlay fit the grid the details are too small to see and use to make an accurate plot. If I zoom into the next level the map grid cannot be used without guessing the longitude scaling because a whole map grid square will not fit on the screen.


Is there a mod, adjustment, etc. which will allow me a finer zoom?