Basic Panel Tone Sliders no longer respond to ALT Key
I have a pet bird who likes to play on the desk. Today she trampled on the keyboard while I was editing images and must have pressed some crucial keys. Now I find that when I press the ALT key while clicking on basic panel tone sliders, I no longer get a representation of clipped areas. The words 'reset tone' come up instead. I've looked on line but cannot find any reference to how to restore the response of the tone sliders so that I can see clipped bits. Any assistance is greatly appreciated.
