diff --git a/doc/source/web_usage.rst b/doc/source/web_usage.rst
index b5c59e20a425f276c94357f37fe51441b32c0315..2986cb92aa208f47c037d8a9c071637d10d92de1 100644
--- a/doc/source/web_usage.rst
+++ b/doc/source/web_usage.rst
@@ -3,12 +3,167 @@ Web usage
 
 The web interface of JASS allows you to launch joint analyses over different datasets, and explore their results.
 
-.. image:: _static/jass_welcome_page.png
+The JASS software is available at the following web address: https://jass.pasteur.fr/index.html 
+
+.. image:: _static/00__JASS_welcome_page.PNG
   :width: 100%
   :alt: JASS welcome page
 
-The next screen lets you choose the datasets that you wish to analyse
+.
+
+Two types of analysis are offered to the user:
+    1. A genome-wide analysis (A),
+    2. An analysis by region  (B).
+
+
+A - Genome-wide analysis
+------------------------
+To perform a genome-wide analysis, yo have to click on the first button at the bottom of the home page of the JASS web interface (A).
+
+By doing so, you automatically access to the screen of the phenotypes selection that lets you choose the datasets that you wish to analyse.
 
-.. image:: _static/jass_select_phenotypes.png
+On this page, you can check the boxes corresponding to the phenotypes on which you wish to perform the genome-wide analysis.
+Then, you have to validate your choice.
+
+If your choice is not pertinent, you receive a warning message.
+
+.. image:: _static/01__JASS_select_phenotypes_warning.PNG
+  :width: 100%
+  :alt: JASS phenotype selection warning page
+
+.
+
+Otherwise the analysis is started automatically.
+
+.. image:: _static/02__JASS_select_phenotypes.PNG
   :width: 100%
   :alt: JASS phenotype selection page
+
+.. image:: _static/03__JASS_select_phenotypes_progress.PNG
+  :width: 100%
+  :alt: JASS Analysis in progress page
+
+.
+
+Then, you access to the results page of the joint analysis carried out on the whole genome and on the phenotypes previously selected (A1).
+
+.. image:: _static/04__JASS_Manhattan_plot.PNG
+  :width: 100%
+  :alt: JASS Manhattan plot page
+
+.
+
+On this page, you can choose to export the results of your joint analysis (A1-1).
+
+.. image:: _static/05__JASS_data_table_export.PNG
+  :width: 100%
+  :alt: JASS data table export page
+
+.
+
+You can also choose to export all the SNP results for the phenotypes analyzed together (A1-2).
+ 
+The button is grayed out with a busy icon until the results file is available. Then the button becomes active again when the generation of results is complete.
+
+.. image:: _static/06__JASS_genome_full.PNG
+  :width: 100%
+  :alt: JASS genome full page
+
+.
+
+You can can also download an image in PNG format of the Manhattan plot of the jointly analyzed phenotypes (A1-3).
+
+.. image:: _static/07__JASS_Manhattan_download.PNG
+  :width: 100%
+  :alt: JASS Manhattan download page
+ 
+.
+
+You can also download an image in PNG format of the quadrant plot of the jointly analyzed phenotypes (A1-4).
+
+.. image:: _static/08__JASS_Quadrant_download.PNG
+  :width: 100%
+  :alt: JASS Quadrant download page
+
+.
+
+With the directlink button, you obtain an https link which allows direct access to the results of the analysis without going through the phenotype selection page (A1-5).
+
+This link can be copied and shared with another JASS user.
+
+.. image:: _static/09__JASS_direct_link.PNG
+  :width: 100%
+  :alt: JASS direct link page
+
+.
+
+Finally, you can get a table of the significant regions which you can download in CSV format (A1-6).
+
+.. image:: _static/10__JASS_significant_region.PNG
+  :width: 100%
+  :alt: JASS significant region page
+
+.
+
+You can also get additional information about a particular region of the genome by clicking on a point on the main Manhattan plot.
+
+.. image:: _static/11__JASS_zoom_Manhattan_01.PNG
+  :width: 100%
+  :alt: JASS zoom Manhattan page 01
+
+.. image:: _static/12__JASS_zoom_Manhattan_02.PNG
+  :width: 100%
+  :alt: JASS zoom Manhattan page 02
+
+.
+
+Then, you can see a heatmap of the z-scores associated with the selected phenotypes, as a function of the SNPs of the region.
+ 
+Below the heatmap, you can see a Manhattan plot zoomed in on the selected region.
+
+.. image:: _static/13__JASS_zoom_Manhattan_03.PNG
+  :width: 100%
+  :alt: JASS zoom Manhattan page 03
+
+.
+
+B - Analysis by region
+----------------------
+To perform an analysis by region, you have to click the second button at the bottom of the home page of the JASS web interface (B).
+
+By doing so, you automatically access to the selection page for the region and the phenotypes studied.
+
+.. image:: _static/14__JASS_LA_select_phenotypes.PNG
+  :width: 100%
+  :alt: JASS Local Analysis selection phenotypes page
+
+.
+
+On this page, you can select the chromosome number, the beginning and the end of the region (in nucleobase pairs number according to the HG37 
+genome’s description).
+
+Like in a genome-wide analysis, you have also to select the phenotypes you wish to analyze jointly.
+
+Then you have to click on the button to launch the analysis by region using the chosen parameters.
+
+.. image:: _static/15__JASS_LA_analysis.PNG
+  :width: 100%
+  :alt: JASS Local Analysis in progress page
+
+.
+
+The results page of the analysis by region is then automatically displayed. 
+It provides access to the results table for the selected region, an image in PNG format of a zoom of the Manhattan plot on the genomic region studied 
+as well as a direct access link to the results that can be copied and shared with other users.
+These functions are similar to those already presented in paragraph A and they will not be detailed again.
+
+On this page, two other elements are also displayed:
+    1. A heatmap showing the Z-scores of the phenotypes you selected according to the positions of the SNPs expressed in number of base pairs.
+    2. A zoom of the Manhattan plot on the region you selected.
+
+Below these two plots, you have access to a diagram showing the position of genes and exons referenced in HG37 and which ones belong 
+to the selected region. A color code is used to distinguish the protein coding genes, the genes rRNA from the other genes. 
+
+.. image:: _static/16__JASS_LA_plots.PNG
+  :width: 100%
+  :alt: JASS Local Analysis plots page