diff --git a/README.org b/README.org
index e765a69..bcc01f7 100644
--- a/README.org
+++ b/README.org
@@ -1572,18 +1572,40 @@ compatible with [[info:org#Editing Source Code][source code block editing]] whil
 [[lst:configure-python]] configures [[https://www.python.org][Python]].
 
 *** [[https://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/progmodes/python.el][Python-mode]]
+:PROPERTIES:
+:CUSTOM_ID: sec:python-mode
+:END:
 
 #+caption[Configure =python=]:
 #+caption: Configure =python=.
 #+name: lst:configure-python
-#+begin_src elisp
+#+begin_src emacs-lisp
   (with-eval-after-load 'python
     (custom-set-variables
      '(python-indent-guess-indent-offset nil)
      '(python-shell-interpreter-args "-i -E")))
 #+end_src
 
+*** [[https://github.com/pyenv/pyenv][Pyenv]]
+:PROPERTIES:
+:CUSTOM_ID: sec:pyenv
+:END:
+
+Listing [[lst:enable-pyenv-mode]] configures and enables =pyenv-mode=.
+
+#+caption[Enable =pyenv-mode=]:
+#+caption: Enable =pyenv-mode=.
+#+name: lst:enable-pyenv-mode
+#+begin_src emacs-lisp
+  (when (and (executable-find "pyenv")
+             (require 'pyenv-mode nil 'noerror))
+    (pyenv-mode +1)
+    (pyenv-mode-set "3.9.9/envs/python-3.9.9"))
+#+end_src
 *** [[https://github.com/joaotavora/eglot][Eglot]]
+:PROPERTIES:
+:CUSTOM_ID: sec:eglot
+:END:
 
 Listing [[lst:configure-eglot-for-python]] configures [[https://github.com/joaotavora/eglot][eglot]] with [[https://github.com/python-lsp/python-lsp-server][python-lsp-server]]
 for [[https://www.python.org][Python]].  It defines a hook function to launch [[https://github.com/joaotavora/eglot][eglot]] when it sees a proper
@@ -1689,6 +1711,9 @@ index bf312f6..49e967a 100644
 #+end_src
 
 *** [[https://github.com/pythonic-emacs/anaconda-mode][Anaconda]]
+:PROPERTIES:
+:CUSTOM_ID: sec:anaconda
+:END:
 
 Listing [[lst:configure-anaconda-for-python]] configures [[https://github.com/pythonic-emacs/anaconda-mode][anaconda]]. See
 [[https://github.com/jorgenschaefer/elpy/blob/8d0de310d41ebf06b22321a8534546447456870c/elpy.el#L2775][elpy-module-company]] for how to handle ~company-backends~ as a local variable and
@@ -1748,6 +1773,9 @@ the call to [[info:elisp#Advising Functions][advice-add]] opens Python org-mode
 #+end_src
 
 *** [[https://jedi.readthedocs.io/en/latest/][Jedi]]
+:PROPERTIES:
+:CUSTOM_ID: sec:jedi
+:END:
 
 Listing [[lst:example-py]] is a [[https://www.python.org][Python]] example to test whether [[https://jedi.readthedocs.io/en/latest/][jedi]] in combination
 with and either [[https://github.com/pythonic-emacs/anaconda-mode][anaconda]] or [[https://github.com/joaotavora/eglot][eglot]] works when coding certain functions of for
@@ -1767,20 +1795,6 @@ instance [[https://numpy.org/][numpy]] and [[https://scipy.org/][scipy]].
   print(q)
 #+end_src
 
-*** [[https://github.com/pyenv/pyenv][Pyenv]]
-
-Listing [[lst:enable-pyenv-mode]] configures and enables =pyenv-mode=.
-
-#+caption[Enable =pyenv-mode=]:
-#+caption: Enable =pyenv-mode=.
-#+name: lst:enable-pyenv-mode
-#+begin_src emacs-lisp
-  (when (and (executable-find "pyenv")
-             (require 'pyenv-mode nil 'noerror))
-    (pyenv-mode +1)
-    (pyenv-mode-set "3.9.9/envs/python-3.9.9"))
-#+end_src
-
 *** Info
 
 Listing [[lst:configure-info]] adds a path in my home directory to the places where