diff --git a/extension/Documentation/Manual.rst b/extension/Documentation/Manual.rst
index c4952415db522bd140f991d14ebbd933a5197306..bb980e25cdf6ccf6769908b232624356c9f9b253 100644
--- a/extension/Documentation/Manual.rst
+++ b/extension/Documentation/Manual.rst
@@ -3406,13 +3406,15 @@ See also `downloadButton`_ to offer a download of an uploaded file.
 
 .. _`downloadButton`:
 
-  * *downloadButton* = `<string>` - If given, shows a button to download the previous uploaded file - instead of the string given in
-    `fe.value`. It's important that `fe.value` points to a readable file on the server.
+  * *downloadButton* = `t:<string>` - If given, shows a button to download the previous uploaded file - instead of the string given in
+    `fe.value`. The button is only shown if `fe.value` points to a readable file on the server.
 
-    * If `downloadButton` ist empty, just shows the regular download glyph.
+    * If `downloadButton` is empty, just shows the regular download glyph.
     * To just show the filename: `downloadButton = t:{{filenameOnly:V}}`
     * Additional attributes might be given like `downloadButton = t:Download|o:check file`. Please check `download`_.
 
+      * The following attributes are hard coded (can't be changed): `s|M:file|d|F`
+
   * fileSplit, fileDestinationSplit, tableNameSplit: see split-pdf-upload_
 
 Immediately after the upload finished (before the user press save), the file will be checked on the server for it's