If you have the latest Steam client beta, you may notice a new Steam Deck icon in your friends list indicating who is on the handheld.
That should make it easier to figure out which of your friends is on the Steam Deck or Big Picture mode, as Steam previously used the gamepad icon for both.
Now we just need a “Sent from my Steam Deck” footer for all our chat messages.
Lol
Sent from my SteamDeck
Might as well
Sent from my PSP3000
Penguins gotta brag