diff --git a/docs/admin/01_poster_groups.rst b/docs/admin/01_poster_groups.rst
index 7413c41a17bbb8d83c647925dafcba128a6beb4e..eb4aa314a45e3ecfb18ee9ac1c2596b36479d81c 100644
--- a/docs/admin/01_poster_groups.rst
+++ b/docs/admin/01_poster_groups.rst
@@ -44,3 +44,6 @@ to include or exclude the document from the main menu, and to allow access
 by anonymous users. Documents that are hidden from the menu can be used if
 they should only be accessible through links from external sites, or
 loaded by a digital signage system.
+
+The stable URL for the poster group can be copied from the link
+in the `Filename` column of the `Poster groups` list.