bring doc up-to-date re support of spectra filters, re #7523

Code/Mantid/docs/source/algorithms/LoadNexusProcessed-v1.rst

@@ -9,14 +9,19 @@
 Description
 -----------
 
-The algorithm LoadNexusProcessed will read a Nexus data file created by
-:ref:`algm-SaveNexusProcessed` and place the data into the
-named workspace. The file name can be an absolute or relative path and
-should have the extension .nxs, .nx5 or .xml. Warning - using XML format
-can be extremely slow for large data sets and generate very large files.
-The optional parameters can be used to control which spectra are loaded
-into the workspace (not yet implemented). If spectrum\_min and
-spectrum\_max are given, then only that range to data will be loaded.
+The algorithm LoadNexusProcessed will read a Nexus data file created
+by :ref:`algm-SaveNexusProcessed` and place the data into the named
+workspace. The file name can be an absolute or relative path and
+should have the extension .nxs, .nx5 or .xml. Warning - using XML
+format can be extremely slow for large data sets and generate very
+large files.
+
+The optional parameters can be used to control which spectra are
+loaded into the workspace. If SpectrumMin and SpectrumMax are given,
+then only that range to data will be loaded. A specific list of
+spectra to load can also be given (SpectrumList). Filtering of spectra
+is supported when loading into workspaces of type :ref:`Workspace2Ds
+<Workspace2D>` and also :ref:`EventWorkspaces <EventWorkspace>`.
 
 A Mantid Nexus file may contain several workspace entries each labelled
 with an integer starting at 1. By default the highest number workspace