RE: Function menu missing from top window bar!!

[Drew Adams]

> I can't remember how it's supposed to work, but when you do M-x imenu
> the *Completions* should be sorted by virtue of the normal sorting
> performed by the completion UI.  If you like your GUI menu to be sorted
> when selecting with the mouse, there's imenu-sort-function which you can
> set via M-x customize-variable.  It's supposed to be a user-preference
> rather than being imposed by the author of the major mode.

Set the option value to `imenu--sort-by-name'.  The option doc
tells you:

  "Set it to `imenu--sort-by-name' if you want alphabetic sorting."