Screen colors shifted to x-ray/negative like???

Ok, I'm going to blame this one on my cat It seems that in his nasty habit of taking naps while resting a body part on the keyboard, he has managed to press some obscure key combination that has inverted the colors on my screen (like a color photograph negative). I've searched everywhere to try to revert this, but had no luck so far.

When I restart, and/or log out and back in again, the screen is normal during the booting sequence till I choose the account I want to log in with, then it immediatly goes into "x-ray" mode. If I choose another account, it will boot and log in with no screen problem whatsoever. So this must be either a preference option has been changed via keyboard command or the account is corrupted. Right?

Any help will be greatly appreciated.

Thank you very much!!!
Is this keyboard command documented somewhere?

Thanks again.

sickmacdoc said:

Yep- that and a LOT more keyboard shortcuts can be found in the "Help" menu of the finder!

Click to expand...

...and that is the first place I would've looked if my Help files would work, but ever since I upgraded to 10.5.3 my Help files are useless. Short of starting a new thread, does anybody know if it's possible to reinstall just the Help files from the original Leo DVD.

Thanks again to everybody.

Yes there is.

Go to System Preferences > Keyboard & Mouse > Keyboard Shortcuts.

Just uncheck the "Reverse Black & White" option.

HTH