By the way, this is the Photoshop (full version) forum. The Elements forum is a bit down the hall: http://forums.adobe.com/community/photoshop_elements
Reverse how? Left to right / up to down, or negative?
Both should be easily doable. This is how you'd do them in Photoshop (full version):
Image - Image Rotation - Flip Canvas ... will do the former.
Image - Adjustments - Invert will do the latter.
Thank you, Noel. I will move to the Elements forum. I was referring to a slide image that was transferred as a mirror image. (Print reversed, etc.). I'd like to simply flip the image back to front to avoid having to have it transferred again. Sounds like that's not possible with E10. Thanks again.