How can I reassign hardware buttons at bottom of screen? topic

I got a Note 4 a few days ago (after owning a Note 2 and a Note 3) and for the most part I'm very happy with it. The one thing I don't care for on the Note 4 is that there is no Menu/Options button. (The button that used to be the Options button now brings up the list of recent apps.).

Does anyone know a way to reassign/remap the hardware buttons so I can make the left button a Settings button?