How do I get rid of the little blue arrow on the side of the screen?

Or you can turn off multi Window entirely by going to....settings/device and turn OFF multi Window

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You can actually make it one of the options from the top notifications\context menu... So you'd just have to slide down and turn it on.
 
Instead of dragging down the notifications bar with one finger to get to settings, drag it down with two. This will reveal the entire quick menus [or whatever it's called] panel.
 
Wow. Thanks. Really annoying but never could remember to look up how to remove it. I use the multi window function, just don't want that little arrow.

Plus, it is really bright on the alarm clock apps.
 
Cool.. Are there any reference guides for the using (hold and wait etc.) of the buttons or shortcut tips for note3.?

Note III / Tapatalk app