Hi, I must have pressed a shortcut by mistake as the colors in my comp have all changed. I can't work out how to undo it (see image).
It looks like the shortcut is related to the green/red channels (as these colors have all been inverted) but other colors seem unaffected. I've googled about but without the keyword (i.e. whatever shortcut I'm pressing), it leads me nowhere.
Thanks for reading and hopefully someone can save me!