I know that there is
RefTeX with its TOC, and I know how to include
\frametitle there (see here). Nevertheless, I would like to see
\frametitle also appear in
imenu. What would be the minimal way to get to this?
(push '("frametitle" 2) TeX-outline-extra)
See the documentation for
TeX-outline-extra. The first element of the list being added is a regexp and the second is the imenu level. You can also see
LaTeX-section-list for the default levels that imenu uses for latex.
As suggested in the comments, it might be a little safer to use the following. This change makes no difference for my use though.
(push '("\\\\frametitle\\b" 2) TeX-outline-extra)