When I press the ALT key to show the blacks/whites/shadows clipping nothing happens. I can move the slider but nothing changes in the photo. If I am on the blacks, the photo will go all white but when I move the slider no clippings show. Basically nothing happens. I am running LR 4.4 on Windows 7.
Probably a dumb question, but you are moving Blacks to the left for clipping and Whites to the right?
Does the histogram show peaks at the ends?
Do the clipping warnings show blue for Blacks and red for Whites?
I move the slider both ways... nothing happens.
The histogram will move and change but nothing shows on the whited out photo, yet changes are being made to the photo.
No blue or red warnings appear.