Multiple exposure type photography is probably my favourite form of photography. Most of the time I plan the picture by getting it aligned before shooting, however sometimes it is just a ‘shoot & see what happens’ type scenario. You can really play around with the composition of a scene. Shooting horizontally & flipping the camera around 180 degrees is a style that I use often.
If you have the function on your camera, do not be afraid to use it. Give it a try & see what wonderful captures you get, you may be quite surprised with the results!