On my mouse if you tilt the scrollwheel to the left or the right it allows you to scroll left and right on webpages and other programs with a horizontal scrollbar as opposed to scrolling up and down by rotating the wheel up or down.
I noticed that the Input Manager and game launcher Input section does not even detect these buttons when I try to put them in as a usable key.
Is there a way (even a hacky way that would involve using some outside program to assign the left/right scrollwheel buttons to other keys) to assign and use these buttons while in game?
*Edit: I found this article on how to forcibly reassign those buttons:
http://www.howtogeek.com/howto/14400/use-those-extra-mouse-buttons-to-increase-efficiency/
but is there a way to get them to work in Unity without outside programs?