I recently purchased the d5100, and am still learning how to use it. Does anyone know how to turn on the multiple exposure? Right now, it's set to "off", and whenever I try to select it to change it to "on" it says "This option is not available at current settings or in the camera's current state." I've fiddled around, but I can't seem to figure out what settings I need to change. The manual is no help -- it says just click on it and change it to "on". Any suggestions? Thanks.