Index: src/sas/qtgui/Calculators/media/sas_calculator_help.rst
===================================================================
--- src/sas/qtgui/Calculators/media/sas_calculator_help.rst	(revision 417c03f075685f86777838c8c717dec8e0ed8965)
+++ src/sas/qtgui/Calculators/media/sas_calculator_help.rst	(revision 2f539b22542f126c701aee99b72be9d49333aa03)
@@ -24,5 +24,5 @@
 
 Assuming that all the pixel sizes are the same, the elastic scattering
-intensity from the particle is
+intensity from the particle is defined as
 
 .. image:: gen_i.png
@@ -33,5 +33,5 @@
 the position of the $j^\text{th}$ pixel respectively.
 
-The total volume $V$
+The total volume $V$ is equal to
 
 .. math::
@@ -43,9 +43,11 @@
 density * Avogadro number) for the atomic structures).
 
-$V$ can be corrected by users. This correction is useful especially for an
-atomic structure (such as taken from a PDB file) to get the right normalization.
-
-*NOTE! $\beta_j$ displayed in the GUI may be incorrect but this will not
-affect the scattering computation if the correction of the total volume V is made.*
+$V$ can be corrected by users (input parameter `Total volume`). This correction
+is useful especially for an atomic structure (such as taken from a PDB file)
+to get the right normalization.
+
+*NOTE! $\beta_j$ displayed in the GUI may be incorrect (input parameter
+`solvent_SLD`) but this will not affect the scattering computation if the
+correction of the total volume V is made.*
 
 The scattering length density (SLD) of each pixel, where the SLD is uniform, is
@@ -99,14 +101,26 @@
 .. image:: mxp.png
 
+
+
 .. image:: myp.png
 
+
+
 .. image:: mzp.png
 
+
+
 .. image:: mqx.png
 
+
+
 .. image:: mqy.png
 
-Here the $M0_x$, $M0_y$ and $M0_z$ are the $x$, $y$ and $z$
+Here the $M_{0x}$, $M_{0y}$ and $M_{0z}$ are the $x$, $y$ and $z$
 components of the magnetisation vector in the laboratory $xyz$ frame.
+
+
+.. .. image:: Mxyzp.png
+
 
 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
@@ -115,7 +129,23 @@
 --------------
 
-.. image:: gen_gui_help.png
-
-After computation the result will appear in the *Theory* box in the SasView
+.. figure:: gen_gui_help.png
+
+   ..
+
+   1) Load .sld, .txt, or .omf datafile
+   2) Select default shape of sample
+   3) Draw magnetization with arrows (not recommended for a large number of
+      pixels).
+   4) Ratio of (+/total) neutrons after analyser
+   5) Ratio of (+/total) neutrons before sample
+   6) Polarization angle in degrees
+   7) Default volume calculated from the pixel info
+      (or natural density of pdf file)
+   8) Compute the scattering pattern
+   9) Reset GUI to initial state
+   10) Display mean values or enter a new value if enabled
+   11) Save the sld data as sld format
+
+.. After computation the result will appear in the *Theory* box in the SasView
 *Data Explorer* panel.
 
@@ -126,5 +156,5 @@
 of neutrons before the sample and at the analyzer, respectively.
 
-*NOTE 1. The values of* Up_frac_in *and* Up_frac_out *must be in the range
+*NOTE 1. The values of Up_frac_in and Up_frac_out must be in the range
 0.0 to 1.0. Both values are 0.5 for unpolarized neutrons.*
 
@@ -133,5 +163,5 @@
 
 *NOTE 3. For the nuclear scattering length density, only the real component
-is taken account.*
+is taken into account.*
 
 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
@@ -151,8 +181,19 @@
 
 where $v_j \beta_j \equiv b_j$ is the scattering
-length of the $j^\text{th}$ atom. The calculation output is passed to the *Data Explorer*
+length of the $j^\text{th}$ atom.
+.. The calculation output is passed to the *Data Explorer*
 for further use.
 
-.. image:: pdb_combo.jpg
+.. figure:: pdb_combo.png
+
+   ..
+
+   1) PDB file loaded
+   2) disabled input for *Up_frac_in*, *Up_frac_oupt*, *Up_theta*
+   3) option to perform the calculations using "Fixed orientations" (2D output)
+      or "Averaging over all orientations using Debye equation" (1D output).
+      This choice is only available for PDB files.
+
+
 
 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
