Help with the Input Windows

Okay so I build my game and that all works just fine but the problem is that once the player starts the game if they want to make an edit to there input they can’t bring the input window back up. Not to what I know if any body knows how to bring the input window back up while my built game is running please post.

Other wise I would like some suggestions on what I should do instead.

Thanks EnderManWiggins