The rotation of source map introduced in version 4 is great, however it does not solve an imprtant issue. A lot of historical maps and plans (like cities from old sketches) have landmarks drawn. When such map is NOT oriented to the North, then after rotating the base map, it does not look good. It would be great, if there would be a possibility to rotate also the base map (openstreetmap, google maps, satelite view, etc)