Updated user documentation. MK

doc/user/tricsingle.htm

@@ -14,8 +14,18 @@ to be solved are:
 <li>Measure a couple of reflections.
 <li>Furthermore there are some specialities.
 </ul> 
-</P>
-<h2>Locate Reflections</h2>
+There are two ways to achieve all this: The older way uses some built in SICS functionality plus some external prograsm inherited from the ILL. This is called the ILL operation. Then a complete four circle packaage called DIFRAC from P. White and Eric Gabe was integrated into SICS. Thsi is The Difrac way of operation.
+</p>
+<h2>DIFRAC</h2>
+<p>
+The DIFRAC commands are accessed by prepending the difrac commands
+with <b>dif</b>. For example: "dif td" calls the difrac td
+command. For more information on DIFRAC commands see the separate
+DIFRAC manual.
+</p> 
+
+<h2>ILL operation</h2>
+<h3>Locate Reflections</h3>
 <p>
 If you know x-ray single crystal diffractometers you'll expect sophisticated
 reflection search procedures here. Nothing is available in this field in
@@ -53,12 +63,12 @@ accomplished with the object rliste which has the following subcommands:
 <DD>Writes the contents of the reflection list to the file specified.
 </DL>
 </p>
-<h2>Indexing Reflections and Refining UB-Matrix</h2>
+<h3>Indexing Reflections and Refining UB-Matrix</h3>
 <p>
 For these purposes the external programs <a href="illprog.txt">INDEX and
 RAFIN </a> are provided. These programs are courtesy of the ILL, France.    
 </p>
-<h2>Measuring Reflections</h2>
+<h3>Measuring Reflections</h3>
 <p>
 Before measuring reflections a list of reflections to measure must be
 created. This is done with the external program