Stream to a conference room display
You can use Apple TV as a conference room display so that anyone can easily share their screen from a Mac or iOS device using AirPlay. When Conference Room Display is turned on, a message appears on the display with AirPlay connection instructions and wireless network details.
Turn on Conference Room Display
Open Settings
on Apple TV.Go to AirPlay > Conference Room Display, then make sure Conference Room Display is turned on.
Create a custom message
Open Settings
on Apple TV.Go to AirPlay >Conference Room Display > Custom Message, then enter your message.
Your message appears only when Apple TV is in Conference Room Display mode.
Choose a background
Open Settings
on Apple TV.Go to AirPlay >Conference Room Display > Choose Photo, then choose one of the photo-based background types.
If you choose My Photos, the Photos app opens.
Preview Conference Room Display mode
Open Settings
on Apple TV.Go to AirPlay > Conference Room Display, then go to Conference Room Display > Preview.
Lock Conference Room Display mode
You can set Apple TV so that Conference Room Display mode is locked until a four-digit passcode is entered.
Open Settings
on Apple TV.Go to General > Restrictions and enter the passcode if required.
Make sure Conference Room Display is set to Restrict in the list of restricted items. For more information, see Restrict access to content on Apple TV.
Note: You use the same 4-digit passcode you set in Restrictions to unlock Conference Room Display mode. If you forget the passcode, disconnect Apple TV from the power point, reconnect it, then press and hold the 
button as it restarts. This temporarily unlocks Conference Room Display mode. For more information, see the Apple Support article Use Conference Room Display mode and related settings on your Apple TV.