Giving the device a gentle shake will take you to the settings menu. These are the settings that can be adjusted:

• Brightness - press and hold the side button while adjusting the screen's brightness with the scroll wheel
• Volume - access this menu to adjust the device's various volume settings
• Bluetooth - connect bluetooth headphones
• Network - connect to a Wi-Fi network
• Security - update your passcode here
• Power Off - select and confirm to power off the device 
  • if the device becomes unresponsive, press and hold the button for 60 seconds to shutdown the device.
• Enable Terminal - this enables the touchscreen keyboard to allow for private interactions with your r1.  When enabled, rotating r1 (button facing down) will activate the keyboard.
• About - r1OS version and other device details can be found here