More updates to text on thresholding.

docs/source/geometry_snapshots.rst

@@ -18,7 +18,7 @@ The ``#geometry_view:`` command produces either ImageData (.vti) for a per-cell
 #. **Open the file** either from the File menu or toolbar.
 #. Click the **Apply** button in the Properties panel. You should see an outline of the volume of the geometry view.
 #. Install the ``gprMax_info.py`` Python script, that comes with the gprMax source code (in the ``tools/Paraview macros`` directory), as a macro in Paraview. This script makes it quick and easy to view the different materials in a geometry file. To add the script as a macro in Paraview choose the file from the Macros->Add new macro menu. It will then appear as a shortcut button in the toolbar as shown in :numref:`pv_toolbar`. You only need to do this once, the macro will be kept in Paraview for future use.
-#. Click the ``gprMax_info`` shortcut button. All the materials in the model should appear in the Pipeline Browser as Threshold items as shown in :numref:`pv_pipeline`. Also a threshold for the PML region as well as any sources and receivers in the model.
+#. Click the ``gprMax_info`` shortcut button. All the materials in the model should appear in the Pipeline Browser as Threshold items as shown in :numref:`pv_pipeline`.
 
 .. _pv_pipeline: