Originally Posted by
sweeks
Not to be pedantic, but this description applies to the right shifter (rear derailleur) only. For the front, the thumb shifts *up* (to a bigger chainring/higher gear), and the finger shifts to smaller chainrings/lower gears (*down*).
Steve
Thanks -- you both answered my question (I may have asked it too vaguely). Yes, the thumb pulls cable and the finger button releases it one indexed click at a time.