A:
MULTI WINDOW: to access this, you go into 1. settings. 2. My Device. 3. Click box that says multi window until check is in box.
To use this feature there will be an arrow on the side, drag that over and you will see a list of apps, if you hold and drag Icons onto the screen it will allow muti window of only apps available in the list.
AUTO BRIGHTNESS: Stopping random dimming, follow steps 1&2, then 3.Go to Display. 4. Brightness. 5. Uncheck box next to auto brightness