Keys corresponding to WP8.1 emulator functions

These keys were discovered simply by pressing them on the keyboard. I'm using a standard Windows-style US keyboard layout.
The emulator function is on the left and the associated key is on the right.

• Back button: Escape key
  • Enter multitasking: hold down Escape
  • Alternatively, you can also use F1 (both just going back and for going into multitasking) and F2 (only going back, no multitasking)
• Start button: Windows/Meta key (this may be wrong, I need to check)
• Search button: F3
• Camera button: F7
  • Focus camera: hold down F6 (while in the camera app)
• Volume Up button: F9
• Volume Down button: F10
• Voice recognition via Cortana/Bing Search app: hold down F11
• Lock button: F12
• Take a screenshot: press F9 and F12 at the same time