For most of you this function will remain unused but there are some countries that corrupt their public maps for whatever reasons, military etc. by offsetting them in unknown directions. There are also some of you who have incorrectly calibrated their map and want to move it temporarily on the correct place. To correct such maps locally there is the offset function that enables to shift the map on two axes.
Select a map to display (and to offset) in the Maps Manager. If you want to use another map layer to check the offset, use the Map overlays function to define the overlay map and their mutual opacity.