The mouse wheel zooms in or out.
Left-click and drag to reposition the map.
Use the "Maps" menu to choose Open Street Maps, Satellite Map, or Topo Map. You may also load a gpx, kml, or kmz gps track with pictures. "Clear Map" removes all gps tracks.
Menu "Map/Add Photo Marker" adds a map marker for the photo chosen.
Menu "Map/Show Track Points" displays individual points for the loaded track. The right-click popup menu allows deleting the selected point.