head

manual/source/system_requirements.rst

@@ -9,7 +9,7 @@ on less powerful hardware but you may not get the performance you desire.
 * 2Ghz CPU
 * 1GB RAM
 * 100MB free disk space
-* Windows XP/Vista/Windows 7, Linux, Mac OS X (10.5 or greater), Free BSD
+* Windows XP/Vista/Windows 7, Linux, Mac OS X (10.5 or 10.6), Free BSD
 * Multiple Monitor Support is highly recommended (not required)
 * For Presentation support:
 

manual/source/themes.rst

@@ -38,7 +38,9 @@ type: Solid Color, Gradient, or Image.
 
 **Image:** 
     You have the ability to use an image for your background. OpenLP accepts a 
-    variety of image types.  
+    variety of image types. JPG is the most common format of images but can 
+    cause previews to be slow. If you experience this you may want to convert
+    your image to PNG as it previews quicker than other formats.	
 
 .. image:: /pics/theme_manager_image.png
 

manual/source/troubleshooting.rst

@@ -201,5 +201,13 @@ OpenLP is not displaying correctly, or is not on the correct screen
 Please read the documentation on :ref:`dualmonitors`. It is very important to
 have dual monitors setup properly for OpenLP to function as expected.
 
+Previews are slow to load when using a theme with an image background
+---------------------------------------------------------------------
 
-
+If you are using a JPG formatted image for your background try converting it 
+to another format. There is a notable performance difference between JPG and 
+a format such as PNG. Other formats work in OpenLP but PNG is the preferred 
+image format and yields the best performance. Images should also be sized to
+the size of your output. For example, if your output screen is 1024x768 you 
+should size your background image to 1024x768 also. OpenLP does not scale
+images.