Index: src/sas/sasgui/perspectives/fitting/media/fitting_help.rst
===================================================================
--- src/sas/sasgui/perspectives/fitting/media/fitting_help.rst	(revision 26c8be33b9ea774c36c0d8fe18b190e6d1cfb90f)
+++ src/sas/sasgui/perspectives/fitting/media/fitting_help.rst	(revision 5295cf5164af9572978a04500767b155d0356342)
@@ -34,5 +34,7 @@
 *  in *Single* fit mode - individual data sets are fitted independently one-by-one
 
-*  in *Simultaneous* fit mode - multiple data sets are fitted simultaneously to the *same* model with/without constrained parameters (this might be useful, for example, if you have measured the same sample at different contrasts)
+*  in *Simultaneous* fit mode - multiple data sets are fitted simultaneously to
+   the *same* model with/without constrained parameters (this might be useful,
+   for example, if you have measured the same sample at different contrasts)
 
 *  in *Batch* fit mode - multiple data sets are fitted sequentially to the *same* model (this might be useful, for example, if you have performed a kinetic or time-resolved experiment and have *lots* of data sets!)
@@ -43,11 +45,17 @@
 -----------------
 
-By default, the models in SasView are grouped into five categories
-
-*  *Shapes* - models describing 'objects' (spheres, cylinders, etc)
+The models in SasView are grouped into categories. By default these consist of:
+
+*  *Cylinder* - cylindrical shapes (disc, right cylinder, cylinder with endcaps
+   etc)
+*  *Ellipsoid* - ellipsoidal shapes (oblate,prolate, core shell, etc)
+*  *Parellelepiped* - as the name implies
+*  *Sphere* - sheroidal shapes (sphere, core multishell, vesicle, etc)
+*  *Lamellae* - lamellar shapes (lamellar, core shell lamellar, stacked
+   lamellar, etc)
 *  *Shape-Independent* - models describing structure in terms of density correlation functions, fractals, peaks, power laws, etc
-*  *Customized Models* - SasView- or User-created (non-library) Python models
-*  *Uncategorised* - other models (for reflectivity, etc)
+*  *Paracrystal* - semi ordered structures (bcc, fcc, etc)
 *  *Structure Factor* - S(Q) models
+*  *Plugin Models* - User-created (custom/non-library) Python models
 
 Use the *Category* drop-down menu to chose a category of model, then select
@@ -84,7 +92,7 @@
 .. image:: cat_fig0.bmp
 
-The categorization of all models except the customized models can be reassigned,
-added to, and removed using *Category Manager*. Models can also be hidden from view
-in the drop-down menus.
+The categorization of all models except the user supplied Plugin Models can be
+reassigned, added to, and removed using *Category Manager*. Models can also be
+hidden from view in the drop-down menus.
 
 .. image:: cat_fig1.bmp
@@ -93,7 +101,7 @@
 ^^^^^^^^^^^^^^^^^
 
-To change category, highlight a model in the list by left-clicking on its entry and
-then click the *Modify* button. Use the *Change Category* panel that appears to make
-the required changes.
+To change category, highlight a model in the list by left-clicking on its entry
+and then click the *Modify* button. Use the *Change Category* panel that appears
+to make the required changes.
 
 .. image:: cat_fig2.bmp
@@ -106,7 +114,7 @@
 ^^^^^^^^^^^^^^^^^^^^^
 
-Use the *Enable All / Disable All* buttons and the check boxes beside each model to
-select the models to show/hide. To apply the selection, click *Ok*. Otherwise click
-*Cancel*.
+Use the *Enable All / Disable All* buttons and the check boxes beside each model
+to select the models to show/hide. To apply the selection, click *Ok*. Otherwise
+click *Cancel*.
 
 *NB: It may be necessary to change to a different category and then back again*
@@ -118,5 +126,6 @@
 ---------------
 
-For a complete list of all the library models available in SasView, see the `Model Documentation <../../../index.html>`_ .
+For a complete list of all the library models available in SasView, see
+the `Model Documentation <../../../index.html>`_ .
 
 It is also possible to add your own models.
@@ -131,7 +140,11 @@
 There are essentially three ways to generate new fitting models for SasView:
 
-* Using the SasView :ref:`New_Plugin_Model` helper dialog (best for beginners and/or relatively simple models)
-* By copying/editing an existing model (this can include models generated by the *New Plugin Model* dialog) in the :ref:`Python_shell` or :ref:`Advanced_Plugin_Editor` (suitable for all use cases)
-* By writing a model from scratch outside of SasView (only recommended for code monkeys!)
+*  Using the SasView :ref:`New_Plugin_Model` helper dialog (best for beginners
+   and/or relatively simple models)
+*  By copying/editing an existing model (this can include models generated by
+   the New Plugin Model* dialog) in the :ref:`Python_shell` or 
+   :ref:`Advanced_Plugin_Editor` (suitable for all use cases)
+*  By writing a model from scratch outside of SasView (only recommended for code
+   monkeys!)
 
 Please read the guidance on :ref:`Writing_a_Plugin` before proceeding.
@@ -163,6 +176,6 @@
 ^^^^^^^^^^^^^^^^
 
-Relatively straightforward models can be programmed directly from the SasView GUI 
-using the *New Plugin Model Function*.
+Relatively straightforward models can be programmed directly from the SasView
+GUI using the *New Plugin Model Function*.
 
 .. image:: new_model.bmp
@@ -175,7 +188,7 @@
 *checked*\ .
 
-Also note that the 'Fit Parameters' have been split into two sections: those which 
-can be polydisperse (shape and orientation parameters) and those which are not
-(eg, scattering length densities).
+Also note that the 'Fit Parameters' have been split into two sections: those
+which can be polydisperse (shape and orientation parameters) and those which are
+not (eg, scattering length densities).
 
 A model file generated by this option can be viewed and further modified using
@@ -187,11 +200,11 @@
 .. image:: sum_model.bmp
 
-This option creates a custom model of the form::
-
-     Custom Model = scale_factor \* {(scale_1 \* model_1) \+ (scale_2 \* model_2)} \+ background
+This option creates a custom Plugin Model of the form::
+
+     Plugin Model = scale_factor * {(scale_1 * model_1) +/- (scale_2 * model_2)} + background
 
 or::
 
-     Custom Model = scale_factor \* model_1 \* model_2 \+ background
+     Plugin Model = scale_factor * model_1 /* model_2 + background
 
 In the *Easy Sum/Multi Editor* give the new model a function name and brief
@@ -232,10 +245,11 @@
 Simply highlight the plugin model to be removed. The operation is final!!!
 
-*NB: Plugin models shipped with SasView cannot be removed in this way.*
+*NB: Models shipped with SasView cannot be removed in this way.*
 
 Load Plugin Models
 ^^^^^^^^^^^^^^^^^^
 
-This option loads (or re-loads) all models present in the *~\\.sasview\\plugin_models* folder.
+This option loads (or re-loads) all models present in the
+*~\\.sasview\\plugin_models* folder.
 
 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
@@ -400,6 +414,6 @@
 :ref:`Assessing_Fit_Quality`.
 
-*NB: If you need to use a customized model, you must ensure that model is available*
-*first (see* :ref:`Adding_your_own_models` *).*
+*NB: If you need to use a custom Plugin Model, you must ensure that model is
+available first (see* :ref:`Adding_your_own_models` *).*
 
 Method
@@ -484,8 +498,8 @@
 If multiple data sets are in one file, load just that file. *Unselect All Data*, then
 select a single initial data set to be fitted. Fit that selected data set as described
-above under :ref:`Single_Fit_Mode` .
-
-*NB: If you need to use a customized model, you must ensure that model is available*
-*first (see* :ref:`Adding_your_own_models` *).*
+above under :ref:`Single_Fit_Mode`.
+
+*NB: If you need to use a custom Plugin Model, you must ensure that model is
+available first (see* :ref:`Adding_your_own_models` *).*
 
 Method
