Improved Big Picture Mode Now Available For Testing In Latest Steam Beta
The updated Big Picture mode is a controller-first interface and includes a new home screen, a new universal search, new controller configurator, updated in-game overlay, and a variety of other improvements.
Valve's updated Steam Big Picture mode that is optimized for the Steam Deck is now available in the latest Steam desktop client beta.
Besides needing to be running the Steam client beta from today or newer, activating the new Big Picture mode requires launching Steam with the "-gamepadui" argument.
Today's Steam beta in addition to the new Big Picture mode also reduces client load times for users with large game libraries. More details on the updated Steam Big Picture mode via SteamPowered.com.