You Can Swap Your ‘A’ and ‘B’ Buttons if You’re a Born and Raised Nintendo Switch User

It’s a small thing, but many folks out there are not used to the A button being below the B button. The Nintendo Switch has it–well–switched, so some users would rather not have to get their thumbs used to a different control setup.
You’ll find this option by hitting the Steam button, going down to Settings then looking under Controller. It’s a simple switch, but remember to change it back. You’ll have to use the ‘B’ button instead to select the toggle.