Mac colour display - what on earth has DS done??

[chocbutton]

DS has pressed something on the Mac and the desktop now looks like a weird negative! Help, how do I get it back to normal? And can you lock it so he can't mess with it again?

Look in the "Universal Access control panel" to put it back to normal.

Or I think this shortcut works

Command-Option-Control-8

But I don't have a MAC so can't test it.

"Universal Access control panel" is under system preferences apparently

hurray thank you