Pressing F2 in PIE makes my game look cool. How can I force the game to look like that?

Sorry for the bump. But does nobody know how to do ? Maybe I could call a console command on begin play and force the game to press F2?
Edit: Nevermind, can’t figure how to force a button press. I’d still like to know how to force the game to look like how it does in PIE when you press F2 or at least know what that mode is called. I can’t find any literature about it.