Some might find this new "Multi Window" tab feature useful, but some find this pointless as it can be pretty annoying at times.
How to remove "quick access sidebar" on Samsung Galaxy
Method #1 (As Demonstrated in the Video)
- Pull down the menu bar (notification bar).
- Scroll the tabs to the right and tap Multi Window option to disable (should be all blue)
- You're done!
Method #2 (Easier Way)
Tap and hold the back button for few seconds until the side tab disappears. It can be enabled using the same method.