Among the changes to the Switch 2 Joy-Con charging grip and Pro Controller is the addition of GL and GR buttons, which are on the underside of the handles. Nintendo has recently shared that players can customize these buttons to map to specific actions on a per-game basis.
In an overview posted on the Nintendo Today app, the company explained that the new buttons are fully mappable by the player. This means that they can take on the role of any other button on the controller. Moreover, these mappings can be set for each game, meaning that you’ll have the ability to set up game-specific controller settings.