Re: Backward completions

[Juri Linkov]

> In general, it makes sense to use a key for this that is typically
> associated with switching windows or buffers (e.g. `C-x o'), not a key
> that is typically associated with scrolling (e.g. `M-v' or `prior' aka
> `PgUp').

Please don't forget that *Completions* can be invoked not only from
the minibuffer, but from any buffer that supports completions (via
`lisp-complete-symbol', etc.)

So we can't steal `C-v' and `M-v' as completions scrolling keys instead
of their normal meaning.  Also `M-v' doesn't work for switching to
*Completions* from normal buffers.  So we need a separate dedicated key
to switch to *Completions* from any buffer.

-- 
Juri Linkov
http://www.jurta.org/emacs/