diff --git a/lib/doc/attic/Changelog-Customization-LyX_22x.txt b/lib/doc/attic/Changelog-Customization-LyX_22x.txt
new file mode 100644
index 0000000000..8f9e9e9617
--- /dev/null
+++ b/lib/doc/attic/Changelog-Customization-LyX_22x.txt
@@ -0,0 +1,7 @@
+Modified:
+
+- sec. 5.3.4 new sentence for "Requires"
+- sec. 5.3.6 new items for "Argument"
+- sec. 5.3.6 new entry "ParagraphGroup"
+- sec. 5.3.6 changed ifo for "Requires"
+- sec. 5.3.6 new entry "ToggleIndent"