I have been on the hunt for what exact shortcut the controller hides from us. But there is a steam menu (controllers, advance, show more, at the button) that shows them!
Quickly want to change your volume? Try steam key + left joystick!
Sadly you can not change anything here, altought the menu shows you you can, nothing will be saved after you leave a menu. (I'm not a fan to put the left mouse button on the right button)
A few of them I manually found before written out, also for the people without images:
hold A + R1 + Steam
To use Puck wireless mode righthold A + L1 + Steam
Start Puck wireless mode lefthold B + R1 + Steam Start Bluetooth mode
When on (solid white)
Steam+Y Turn off quickly
Hol steam (10s) Turn off
Steam + left joystick up/down Change volume level
R4 + R5 + L4 + L5 + Steam Backpack mode (ignore buttons until this combo is used again or USB)
Steam + Right trackpad/joystick Mouse movement
Steam + X On screen keyboard
Steam + R1 Take screenshot
Steam + Menu ALT+TAB
Steam + D-pad right Enter key
OC by @JelleWho@lemmy.world

2 Comments
Davel23@fedia.io · 4 pts · 100d
To clarify, I believe the controller has to be off to switch puck or bluetooth modes.
Kolanaki@pawb.social · 3 pts · 100d
These shortcuts are the same for any controller. Just replace "steam button" with "PS button," "Xbox button," or "Home button" for a PS, Xbox, and Nintendo controller respectively. 3rd party controllers, too, if they happen to have that button.
There's supposed to be a way to change them, but I do not know how.