neowin[.]net/news/steam-big-picture-modes-steam-deck-ui-update-is-now-available-in-beta/
Valve is finally going through with the Steam Big Picture Mode upgrade it promised a while ago. In a new beta update to Steam, the company has rolled out the new "controller-first interface" that was originally designed for its massively successful handheld PC, the Steam Deck.As the Steam Deck's interface was designed from the start to be used in both handheld and docked modes, it has translated well to be used on standard PC environments that use controllers. This will be the biggest update Big Picture Mode has received since its debut 10 years ago.
Here are some of the biggest new features that's included in the beta test running right now:
New Home Screen, where you can continue playing recent games, and see what’s new with the games in your library.
New Universal Search, that searches across Library, Store, and your friends
New controller configurator, designed for ease-of-use of picking, adjusting, or creating custom controller configurations
Optimized Steam Store for controller navigation
Updated in-game overlay, with access to achievements and guides
Press Steam / Guide / PS button while in game
New system menu, for quick navigation to different parts of the interface
Access this with the Steam / Guide / PS button
New quick access menu, for access to notifications, friends list, quick settings, and more.
Access this with Steam / Guide / PS button + A
To join the test, Steam users must first opt into the Steam Client Beta build by going into Steam Settings > Account > Beta Participation and choosing the option from the dropdown menu. They must then edit the Steam launch shortcut and add "-gamepadui" as a launch parameter before launching the platform through that.