Updated documentation

docs/source/interfaces/ISIS Reflectometry.rst

@@ -600,9 +600,16 @@ this will cause unsaved changes to be lost.
 
 Live Data Monitoring
 ^^^^^^^^^^^^^^^^^^^^
+.. figure:: /images/ISISReflectometryInterface/live_data_section.png
+  :class: screenshot
+  :width: 800px
+  :align: center
+  :alt: The event handling tab
+
+  *The live data section*
 
 The *Live data* section on the *Runs* tab allows you to start a monitoring
-algorithm that will periodically load live data from the instrument and reduce
+algorithm that will periodically load live data from the instrument, given by the update interval spin box, and reduce
 it with :ref:`ReflectometryReductionOneAuto
 <algm-ReflectometryReductionOneAuto>`. It outputs two workspaces, `TOF_live`
 for the original data and `IvsQ_binned_live` for the reduced data.