You can change, enable or disable the device frame by clicking the settings gear on the top-right corner of the mirrored image. 

Select the "Frame" option from the menu that appears. This will open a menu where you can select a number of frame options.

A number of device frames are available in Reflector 3 for AirPlay and Cast devices. Reflector 3 includes the following frames in multiple color options:

  • iPhone 4S
  • iPhone 5
  • iPhone 5S
  • iPhone 5C
  • iPhone 6
  • iPhone 6 plus
  • iPhone 7 
  • iPhone 7 plus 
  • iPhone 8
  • iPhone 8 plus
  • iPhone X
  • iPad
  • iPad Pro
  • iPad Air
  • iPad Mini
  • Nexus-style phone
  • Galaxy-style phone
  • Galaxy-style tablet
  • Pixel
  • Pixel 2 
  • Pixel XL
  • Pixel C

Reflector 3 will automatically display the frames applicable to your device type.