If you're creating a new group chat: 1. Open the Facebook Messenger app. 2. Tap the "New Message" icon (it looks like a pencil and paper icon) in the top right corner. 3. Select the people you ...

Facebook Messenger allows group video chat for up to 50 people ... go to the “See call participants” icon at the bottom of the screen. A new window pops up. Toggle the Lock Room field to ...