Index: XmakemolDocumentation
===================================================================
RCS file: /cvsroot/xmakemol/xmakemol/web/XmakemolDocumentation,v
retrieving revision 1.11
diff -u -r1.11 XmakemolDocumentation
--- XmakemolDocumentation	11 Dec 2004 15:33:15 -0000	1.11
+++ XmakemolDocumentation	17 Mar 2005 10:29:40 -0000
@@ -179,7 +179,23 @@
 The following option is available for either type of rendering:
 
  - XPM: XPM format rendering of the canvas (only available if XPM
-   support has been compiled in).
+   support has been compiled in). With OpenGL rendering you might get
+   unexpected results though, as seeing the ``shadow'' of the export
+   window in your xpm image. A workaround to this problem is to enable a
+   backing store in your /etc/X11/XF86Config-4 as in:
+   <example>
+   Section "Device"
+           Identifier          "Trident Cyberblade"
+           Driver              "trident"
+           Option              "BackingStore"
+   EndSection
+   </example>
+   In your /var/log/XFree86.0.log you should then find a line like:
+   <example>
+   (**) TRIDENT(0): Backing store enabled
+   </example>
+   
+   
 
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