RE: How to increase the depth of the scan in imenu and speecbar?

[Drew Adams <drew.adams@oracle.com>]

> I started using imenu and speedbar, anr=d I like them, but I would like
> to have not only a second level, but up to e.g. 6th level. Where can I
> set these options? I did not find anything.
> 
> I am particularly talking about orgmode files and their headers, which
> are only shown up to level 2.

See `C-h v imenu-generic-expression'.  I don't think you can have more
than two levels.  Each element of the list must be a list of the form
(MENU-TITLE REGEXP INDEX [FUNCTION] [ARGUMENTS...]). 

You can at least have more submenus (i.e. level 2), to break things
down more.  IOW, instead of trying to have, say, this:

MyMenu
  Variables
    Options

You can just use this:

MyMenu
  Options
  Non-Option Variables

Remember that the regexps are tried in order. So putting Options
(every option is a variable) before Non-Option Variables lets
you use a more general regexp for the latter.

That's at least better than just MyMenu > Variables, i.e., it at
least lets you separate the two kinds of variables.

Taking a look at library `imenu+.el' might help in this regard.
http://www.emacswiki.org/emacs/download/imenu%2b.el