EOS 7D Mark II: multiple exposure RAW shooting

The EOS 7D Mark II features a multiple exposure option to allow you to composite up to nine images into one, directly in-camera. If you have the camera set to ‘M(RAW)’ or ‘S(RAW)’, then be aware that the composited image capture on the memory card will actually be a full RAW image rather than one which matches your image recording settings. You will need to resize the image on your computer after shooting if you want a smaller file.
Camera settings
EOS 7D Mark II