bug#139: Still can't figure out what the command I used is called

[積丹尼 Dan Jacobson]

10 years later. gnus-version "Gnus v5.13" emacs-version "27.1"

If some click / press can do some action,
then surely "C-h k runs the command describe-key"
can, somewhere in its output, tell me what that does.

I mean say poking around, clicking things left and right, I found a neat
command. But what is it? It is neat, but has no name I can dig up.

We do C-h k RET, but of course "the secretary won't let us see what the
command finally points to":

   RET runs the command gnus-article-press-button (found in
   gnus-mime-button-map), which is an interactive compiled Lisp function
   in ‘gnus-art.el’.

   It is bound to RET, <menu-bar> <MIME Part> <Toggle Display>.

   (gnus-article-press-button)

   Check text at point for a callback function.
   If the text at point has a ‘gnus-callback’ property,
   call it with the value of the ‘gnus-data’ text property.

Same with
  <down-mouse-1> at that spot runs the command mouse-drag-region (found
   in global-map), which is an interactive compiled Lisp function in
  ‘mouse.el’...

What they finally (dynamically) point to is still 'top secret' in
emacs-version "27.1".