To turn headset on the Power button is on the left side below the USB port.
To adjust volume, the volume button is on the bottom right side when you are wearing the headset.
The wheel on the bottom left side when wearing the headset is to adjust the spacing of the lens.
This is the view from the front of the headset to note button placement.
When you put on the headset you will be asked to set boundaries. Follow instructions on the headset. When setting the boundary make sure you are an arm length from walls and objects.
To put the headset away turn off the headset by holding down the Power button. The headset will ask if you want to turn off the headset. Confirm. Place controllers and headset in the case as shown.
To capture screenshots press the meta button on the right controller and pull the right trigger. It will confirm that you have captured a picture. To get images off of the headset you will need to plug the headset into a PC. You will give the headset permission to share files and you can open headset folder on the PC to remove images.