mac people - dd1 has managed to turn her screen negative

[Cappuccino]

feck knows what she pressed

it was black and white negative but now we have managed to fiddle with it so it is colour negative - big improvement (not)

what did she do?

I know the monitor is working because the start-up comes up all proper blue and white

but then as soon as the desktop loads it is odd

we have fished through system preferences to no avail

Message withdrawn

god thank you so much that was amazing

I must remember that to do to people at work I don't like

you're a lifesaver she has been looking at this odd screen sadly for days