Samsung Galaxy Camera 2 User Manual (en)

Web & network
Joining Group Play
Join a Group Play session created by another device.
Join group, select a Group Play session to join, and then enter the password for the 
group if necessary.
Using additional features in a Group Play session
While sharing content with other devices, use the following features:
Tap   and write a note or draw on the screen. All participants can see what you create.
Tap   to view all shared images in mosaic layout.
Tap   or   to select more images or documents.
Tap   to view the group participants.