Review local map `pdf-tools' key bindings and add a table

README.org

@@ -2055,7 +2055,9 @@ annotate [[https://en.wikipedia.org/wiki/PDF][PDF]] files.  It also exploits the
 files produced with LaTeX to the original LaTeX sources.  In order to use
 [[https://github.com/vedang/pdf-tools][pdf-tools]], you have to type {{{kbd(M-x pdf-tools-install)}}} after installation
 of [[https://github.com/vedang/pdf-tools][pdf-tools]] from [[https://melpa.org/][MELPA]] or after each update of [[https://github.com/freedesktop/poppler][poppler]] to build or rebuild the
-=epdfinfo= executable that serves the [[https://en.wikipedia.org/wiki/PDF][PDF]] files to Emacs.
+=epdfinfo= executable that serves the [[https://en.wikipedia.org/wiki/PDF][PDF]] files to Emacs.  Table
+[[tab:pdf-tools-commands-and-bindings]] lists important local map ~pdf-tools~ key
+bindings.
 
 #+caption[Setup =pdf-tools=]:
 #+caption: Setup =pdf-tools=.
@@ -2068,9 +2070,7 @@ of [[https://github.com/vedang/pdf-tools][pdf-tools]] from [[https://melpa.org/]
   (pdf-loader-install)
 
   (with-eval-after-load 'pdf-outline
-    ;; Unmask the `image-save' key binding in `pdf-view-mode-map' and
-    ;; in `image-mode-map' (by parenthood).
-    (keymap-set pdf-outline-minor-mode-map "o" nil)
+    ;; The `image-save' key binding is now "i o".
     (keymap-set pdf-outline-minor-mode-map "O" #'pdf-outline))
 
   (with-eval-after-load 'pdf-view
@@ -2078,6 +2078,20 @@ of [[https://github.com/vedang/pdf-tools][pdf-tools]] from [[https://melpa.org/]
             pdf-view-use-scaling (eq system-type 'darwin))))
 #+end_src
 
+
+#+attr_latex: :booktabs yes :float table
+#+caption[Pdf-tools commands with key bindings]:
+#+caption: Pdf-tools commands with key bindings.
+#+name: tab:pdf-tools-commands-and-bindings
+|---------------------------------+--------------|
+| command                         | key binding  |
+|---------------------------------+--------------|
+| *pdf-outline*                   | {{{kbd(o)}}} |
+| *pdf-outline*                   | {{{kbd(O)}}} |
+| *pdf-view-fit-height-to-window* | {{{kbd(H)}}} |
+| *pdf-view-fit-width-to-window*  | {{{kbd(W)}}} |
+|---------------------------------+--------------|
+
 * Writing
 :PROPERTIES:
 :CUSTOM_ID: sec:writing
@@ -4743,8 +4757,7 @@ true in case document headlines contain links.  The code in listing
 #+name: lst:setup-which-function-mode
 #+begin_src emacs-lisp -n :results silent
 ;; https://emacs.stackexchange.com/questions/30894/
-;; https://list.orgmode.org/20240205.141235.268481480563517065.teika@gmx.com/
-
+;; (setopt which-func-display 'header) ;; AFAIU, fails on my system.
 (defvar which-func-functions nil)
 
 (defun which-func-org-function ()
@@ -4781,6 +4794,8 @@ Return \"Front Matter\" when point is above the first headline."
            (hl-page 0)
            (old-title "Front Matter")
            (new-title old-title))
+      ;; Return the first headline on a page which is better than nothing.
+      ;; I can't do better, since `pdf-view-mode' has no notion of point.
       (while (and (< hl-index hl-count) (< hl-page current-page))
         (setq old-title new-title)
         (setq hl-page (alist-get 'page (nth hl-index outline)))