Update documentation on synchronous mode

Docs/configuring_the_simulation.md

@@ -139,11 +139,14 @@ camera.listen(image_queue.put)
 
 while True:
     world.tick()
-    world_snapshot = world.wait_for_tick()
-
     image = image_queue.get()
 ```
 
+For a more complex scenario synchronizing data from several sensors, take a look
+at the example [synchronous_mode.py][syncmodelink].
+
+[syncmodelink]: https://github.com/carla-simulator/carla/blob/master/PythonAPI/examples/synchronous_mode.py
+
 Other command-line options
 --------------------------