Preferred Display setting for big picture mode extra/advanced options

[『lavavex』]

I used the Big Picture mode Preferred Display option as an easy way to play games on my TV that is also hooked up to my PC, Is there any way to allow for that option to also switch between Extend/Mirror mode as well as switch Audio Output?
For Example, My current Desktop configuration has 2 monitors and my TV, the TV and my Main monitor are mirrored but I would like for Big Picture mode to override that and switch to extended mode automatically, then switch back when it exits. Same with Audio output, My audio output is normally my headphones, but when I use big picture mode, I would like the audio output to be my TV, as of now I have to manually do the switch.

[Gwarsbane]

You should post in the big picture section instead of here. Thats where the ones that work on big picture might actually see the suggestion.

https://steamcommunity.com/groups/bigpicture/discussions/

[A v i r t]

This was exactly my issue. I also wanted to makes things easier for my wife to play on TV. So I run a AutoHotkey script to do a couple of things.

1. Switch to another screen (duplicate/extend/only 2nd screen, I do recommend only using 2nd screen because some games wont scale properly)
2. Switch to another audio output.
3. Launch steam in big picture mode
4. Switch back to PC screen

You'll need AutoHotkey and a program called NirCmd which allows you to switch audio output with a command line.

My AHK script:

Numpad1::
Run C:\windows\System32\DisplaySwitch.exe /external
Sleep 2000
Run C:\windows\nircmd setdefaultsounddevice "TV" 1
Run C:\Program Files (x86)\Steam\steam.exe -start steam://open/bigpicture
Return

Numpad5::
Run C:\windows\System32\DisplaySwitch.exe /internal
Sleep 2000
Run C:\windows\nircmd setdefaultsounddevice "Headphones" 1
Return

I hope this helps!

note: I also tried using the "Preferred Display" option in steam big picture. But it doesn't seem to work for me.