(defun 2C-two-columns (&optional buffer)
"Split current window vertically for two-column editing.
\\<global-map>When called the first time, associates a buffer with the current
-buffer in two-column minor mode (see \\[describe-mode] ).
-Runs `2C-other-buffer-hook' in the new buffer.
+buffer in two-column minor mode (use \\[describe-mode] once in the mode,
+for details.). It runs `2C-other-buffer-hook' in the new buffer.
When called again, restores the screen layout with the current buffer
first and the associated buffer to its right."
(interactive "P")