diff --git a/fldigi_doxygen/images/config-cw-qsk.png b/fldigi_doxygen/images/config-cw-qsk.png
index 8adcd6d2..fd64f937 100644
Binary files a/fldigi_doxygen/images/config-cw-qsk.png and b/fldigi_doxygen/images/config-cw-qsk.png differ
diff --git a/fldigi_doxygen/user_src_docs/configCW.txt b/fldigi_doxygen/user_src_docs/configCW.txt
index 22f066e2..0d1d06c5 100644
--- a/fldigi_doxygen/user_src_docs/configCW.txt
+++ b/fldigi_doxygen/user_src_docs/configCW.txt
@@ -153,6 +153,16 @@ length as the edge timing is increased. This is useful when
 operating QSK and listening between the character elements.</li>
 </ul>
 
+<li>The transmitted signal can be further wave shaped using a "Windowed-sinc"
+bandpass filter.  It is enabled by checking the "BPF transmit audio" check box.
+The bandwidth of the filter can be adjusted from 10 to 1000 Hertz with the BPF bw
+control.  The filter will always be centered on the AFCW injection frequency 
+(waterfall TX cursor position).  You should both visually observe and listen to 
+the resulting CW signal.  The easiest way to do this is to enable the "Send continuously",
+select a test character and then press the TX button on the main dialog.  The
+weight, dash/dot, edge shape selection, edge timing, BPF and bandwidth can be 
+changed with immediate effect.
+
 This is what the A2 signal should look like with various settings of
 weight, Dash/Dot and Edge. The audio frequency is 400 Hz and
 the TxWPM is 100 WPM.