How to Map Back Buttons on Steam Deck
Open Steam, head to 'Settings', select 'Controller', then 'Guide Button Chord Configuration.' You can map those back buttons to your heart's content!
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Fire up a game, press the Steam button + X, select the button you want to map, and follow the prompts. Easy peasy!
For real experience, just open any game, hit the quick access menu (Steam button + X), go to 'Controller Settings,' and start mapping away. It's super intuitive!
You don't need a degree for this! Open the game, hit Steam button + X, and use the 'Controller Settings' menu to custom-map your buttons. Done and done.
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