diff --git a/doc/index.txt b/doc/index.txt
--- a/doc/index.txt
+++ b/doc/index.txt
@@ -58,7 +58,17 @@ deleted.
 :rem:`|||:sec:|||`\ Screenshot
 ==================================================
 
-|screenshot|_
+============= =======================================================
+|imageuser|_  Regular user interface:
+
+	      - the user cannot be changed
+	      - the link to the manual is omitted
+
+|imageadmin|_ Administrator interface.
+
+	      - the user can be selected
+	      - a link to the administrator manual is shown
+============= =======================================================
 
 ==================================================
 :rem:`|||:sec:|||`\ Features
@@ -105,8 +115,10 @@ See the `Administrator Manual`_ for inst
 .. :rem:`|||:sec:|||`\ References
 .. ==================================================
 
-.. |screenshot|  image:: ws-vacation-t.jpg
-.. _screenshot: ws-vacation.jpg
+.. |imageuser|  image:: ws-vacation-user-t.jpg
+.. _imageuser: ws-vacation-user.jpg
+.. |imageadmin|  image:: ws-vacation-t.jpg
+.. _imageadmin: ws-vacation.jpg
 
 .. _`Administrator Manual`: README.html
 .. _`ws-vacation`: https://bitbucket.org/wolfmanx/ws-vacation