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As a general standard, when having an icon for a setting, I've never been sure whether to display the icon for the currently enabled setting, or the alternative.
My exact situation is within a mobile game, where the player can choose between tilting the device, or having buttons on the screen to use. So i have two icons, one a mini screen with buttons, the other a mini screen with rotation arrows around it.
So in this situation, should I display the icon that corresponds to the current control setting, or display the opposite one, so they change to that setting when they click on it?
Is it a matter of preference, or is there some standard behind all of this?