Document how to start the gui on a specific call.

diff --git a/README.markdown b/README.markdown
index f39ca1990289f8ce3ee94a60428575cd5d1f554c..d5911367f9bc47d14df2c60aead4f05303f43c70 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -12,8 +12,8 @@ About **apitrace**
 * visualize and edit trace files.
 
 
-Basic usage
-===========
+Obtaining **apitrace**
+======================
 
 To obtain apitrace either [download the latest
 binaries](https://github.com/apitrace/apitrace/downloads) for your platform if
@@ -21,6 +21,10 @@ available, or follow the [build instructions](INSTALL.markdown) to build it
 yourself.  On 64bits Linux and Windows platforms you'll need apitrace binaries
 that match the architecture (32bits or 64bits) of the application being traced.
 
+
+Basic usage
+===========
+
 Run the application you want to trace as
 
     apitrace trace --api API /path/to/application [args...]
@@ -48,10 +52,18 @@ Replay an OpenGL trace with
 Pass the `-sb` option to use a single buffered visual.  Pass `--help` to
 glretrace for more options.
 
+
+Basic GUI usage
+===============
+
 Start the GUI as
 
     qapitrace application.trace
 
+You can also tell the GUI to go directly to a specific call
+
+    qapitrace application.trace 12345
+
 
 Advanced command line usage
 ===========================