From d2dbab06df8e8be3182a794639067f10932462c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20B?=
 <2589111+jfbu@users.noreply.github.com>
Date: Sat, 7 Jan 2023 12:46:15 +0100
Subject: [PATCH] Update CHANGES to announce LaTeX deprecation of internal
 \dimen's

---
 CHANGES | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/CHANGES b/CHANGES
index 52228b4d501..b170ea01b4c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,16 @@ Incompatible changes
 Deprecated
 ----------
 
+* LaTeX: some internal TeX ``\dimen`` registers are since 5.1.0 either not
+  used (and assigning them some dimension value is with no effect), or used
+  via changed names.  They never were mentioned in the docs but do have usable
+  public names, hence this deprecation notice.  They are
+  ``\sphinxverbatimsep``, ``\sphinxverbatimborder``, ``\sphinxshadowsep``,
+  ``\sphinxshadowsize``, and ``\sphinxshadowrule``.  It would be complicated
+  to let their use trigger some warning during PDF builds, so this will be the
+  sole announcement.  They will get removed from LaTeX support files at 7.0.0.
+  (refs: #11105)
+
 Features added
 --------------