And over one year later, with still no fix, I have had to relearn non-inverted mouse control - I am okay in the editor now, but I suck completely at Unreal Tournament 4, my brain has no clue when under pressure if up or down is up or down. Epic, you have destroyed me by not implementing something as simple as invert mouse IN THE EDITOR. Every fps game has the option - many built by Epic’s engines, but Epic itself could not be bothered to provide such a simple feature for the people investing countless hours in learning their product… If UE4 wasn’t so cool, I would have dumped it on principle ages ago…