update cover image info with important note

diff --git a/en/manual.xml b/en/manual.xml
index fcc187b..a062788 100644 (file)
--- a/en/manual.xml
+++ b/en/manual.xml
@@ -20116,10 +20116,10 @@ location: [STAFF, ISO]</programlisting>Will block items with an itype code of
           </listitem>
         </itemizedlist>
 
-        <tip>
-          <para>Large cover images will be resized down to 800x600. Smaller
-          images will not be made larger.</para>
-        </tip>
+        <important>
+          <para>The source image is used to generate a 140 x 200 px thumbnail image and a 600 x 800
+            px full-size image. The original sized image uploaded will not be stored by Koha</para>
+        </important>
 
         <para>You will be able to see your cover images in the staff client on
         the detail page under the 'Image' tab in the holdings table at the