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-rw-r--r--lib/observer/doc/src/observer_ug.xml8
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/observer/doc/src/observer_ug.xml b/lib/observer/doc/src/observer_ug.xml
index ca354df864..be5d249f37 100644
--- a/lib/observer/doc/src/observer_ug.xml
+++ b/lib/observer/doc/src/observer_ug.xml
@@ -254,7 +254,13 @@
<p>
If function calls are traced, trace patterns must be added by clicking button
<em>Add Trace Pattern</em>. Select a module, function(s), and a match specification.
- If no functions are selected, all functions in the module are traced.
+ If no functions are selected, all functions in the module are traced.</p>
+ <p>
+ Trace patterns can also be added for traced messages. This is
+ done in the same way as for traced function calls. Separate
+ trace patterns must be set for sent and received messages.
+ </p>
+ <p>
A few basic match specifications are provided in the tool, and
you can provide your own match specifications. The syntax of match
specifications is described in the <seealso