What is Reverse Disp.?

[TCav]

Then, no, the Canon's feature called "Reverse Disp." doesn't do that, and I can't think of a camera that does. "Reverse Disp." inverts the image in the viewfinder if the camera happens to be upside-down. It does nothing to the image that is recorded on the memory card.

If you really wanted a mirror image of a file, there are lots of ways to do it. In Adobe Photoshop Elements 5.0, its "Image : Rotate : Flip Layer Horizontal".