Horizontal Scroll w/Mouse Wheel in Pro Tools
How to scroll side-to-side (horizontally) with the mouse wheel in Pro Tools.
Normal operation with the mouse wheel is scrolling up and down, but if you press the SHIFT key and scroll, you will scroll horizontally.
By the way, this shortcut works across most applications, even your web browser. You can even use this shortcut while playing back in Pro Tools. Much faster than trying to grab a scroll bar