emerge-scroll-left
emerge-scroll-left is an interactive compiled Lisp function in `emerge.el
'.
(emerge-scroll-left &optional ARG)
Scroll left all three merge buffers, if they are in windows.
If an argument is given, that is how many columns are scrolled, else nearly
the width of the A and B windows. `C-u -' alone as argument scrolls half the
width of the A and B windows.