The scroll wheel in Vixen seems somewhat inconsistent on how it works. Usually, when I spin the wheel, the listing of channels scrolls up and down. Sometimes though, when I spin the wheel, it moves the current selection area up and down. This is sometimes super handy, but iI don't know how that mode enables. Holding down, Ctrl, Shift, and Alt doesn't really make a difference. I even tried the seldom-used Scroll Lock key, no no avail.
How do you toggle between the Scroll modes?