diff --git a/manual/images/scroll.png b/manual/images/scroll.png
new file mode 100644
index 0000000000..26bc044e0c
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diff --git a/manual/viewer.rst b/manual/viewer.rst
index edf3a278c7..e580334bf6 100644
--- a/manual/viewer.rst
+++ b/manual/viewer.rst
@@ -27,6 +27,8 @@ Navigating around an e-book
 
 .. |next| image:: images/next.png
 
+.. |scroll| image:: images/scroll.png
+
 .. |bookmi| image:: images/bookmark.png
 
 .. |toci| image:: images/toc.png
@@ -37,8 +39,9 @@ Navigating around an e-book
 
 
 You can "turn pages" in a book by using the :guilabel:`Page previous` |prev| and :guilabel:`Page next` |next| buttons, or by pressing
-the :guilabel:`Page down`/:guilabel:`Page up` keys. Unlike most e-book viewers, calibre does not force you to view books in paged mode. You can
-scroll by amounts less than a page by using the scroll bar or various customizable keyboard shortcuts. 
+the :guilabel:`Page down`/:guilabel:`Page up` keys. Unlike most e-book viewers, calibre does not force you to view books in paged mode.
+You can switch to flow mode by clicking on the scroll mode button |scroll| at the top right. You can then scroll by amounts less than a page
+by using the scroll bar or various customizable keyboard shortcuts. 
 
 Bookmarks
 ^^^^^^^^^^^^