diff --git a/README.org b/README.org
index 9360811..4b91036 100644
--- a/README.org
+++ b/README.org
@@ -382,6 +382,9 @@ recommendation of [[info:emacs#Saving Customizations][saving customizations (inf
 :CUSTOM_ID: sec:desktop
 :END:
 
+The [[info:emacs#Saving Emacs Sessions][desktop]] library allows to save the state of Emacs from closing a session to
+opening a session.
+
 #+caption[Setup ~desktop~ to save Emacs sessions]:
 #+caption: Setup ~desktop~ to save Emacs sessions.
 #+begin_src emacs-lisp -n
@@ -394,7 +397,7 @@ recommendation of [[info:emacs#Saving Customizations][saving customizations (inf
               ;; Exclude the exclusions from desktop.el.
               (seq bos "/" (zero-or-more (not (any "/:"))) ":")
               (seq "(ftp)" eos)
-              ;; Exclude all (hence, also compiled) Emacs Lisp files:
+              ;; Exclude all (hence, all ob-<lang>.el) Emacs Lisp files:
               (seq ".el" eos)))))
 #+end_src
 
@@ -835,6 +838,39 @@ to claims in [[info:consult#Top][consult (info)]]).
   (setf bookmark-exit-hook 'bookmark-unload-function))
 #+end_src
 
+[[info:emacs#Registers][Registers (info)]]
+:PROPERTIES:
+:CUSTOM_ID: sec:registers
+:END:
+
+Listing [[lst:setup-register][setup register usage]] sets up relevant register options.
+
+#+caption[Setup register usage]:
+#+caption: Setup register usage.
+#+name: lst:setup-register
+#+begin_src emacs-lisp -n
+(with-eval-after-load 'register
+  ;; BUG: (setopt register-separator "\n") warns non-matching type.
+  ;; * lisp/register.el (register-separator): add string type to
+  ;; choice options and clarify documentation.
+  ;; * doc/emacs/regs.texi (Text Registers): fix example setting
+  ;; 'register-separator'.
+  (defcustom register-separator nil
+    "Separator between texts collected in registers, or nil if none.
+
+When collecting text with \\[append-to-register] (or \\[prepend-to-register]),
+the separator is added to the beginning (or end, respectively) of the marked
+text."
+  :group 'register
+  :type '(choice (const :tag "None" nil)
+		 (character :tag "Use register" :value ?+)
+                 (string :tag "Use string" :value "")))
+
+  (setopt register-separator "\n"
+          register-use-preview 'never))
+#+end_src
+
+
 * [[info:emacs#Dired][Dired: directory editor as file manager (info)]]
 :PROPERTIES:
 :CUSTOM_ID: sec:file-manager