Samsung Galaxy S III User Manual page 214

Screen Sharing an Image via Group Play
Important! Verify all of your recipients are connected to the same
Wi-Fi.
1. From the Home screen, tap
2. Open an image and tap
3. Enter a security PIN and tap Done. This process makes sure
only desired recipients can view your shared image.
4. Recipients must launch Group Play on their devices. Your
device then waits for other connected recipients on the same
Wi-Fi network to accept the connection and enter the PIN on
their screens.
5. Other users will have to activate their Group Play functionality
and then select the current Group and enter the correct PIN
code.
You can now interact and draw with the on-screen image, users will
instantaneously see the same gestures and also be able to interact.
Note: The newly altered image (with markups and comments) can not
be saved, but you can take a screen shot of the current image
and save it to your Clipboard.
For more information, refer to "Using Gestures" on page 58.
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(Apps)
(Group Play)
(Gallery).