diff --git a/README.md b/README.md
index e2335b81989dbb8cd07347898e2802334392455c..44f2e1e65b05b303b42ca402cf772eff3be46513 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-![Cesium logo](https://raw.github.com/duniter/cesium/master/cesium-logo.large.blue.sand-dune-250×250.png)
+![Cesium logo](https://github.com/duniter/cesium/raw/master/www/img/logo_144px.png)
 
 # Cesium
 
@@ -6,11 +6,27 @@
 
 Try it at: http://cesium.duniter.fr
 
-There is a [package](https://github.com/duniter/cesium_ynh) for [YunoHost self-hosting distribution](https://yunohost.org).
 
-## Install
+## Installation
+
+### On desktop computer
+ 
+ To use Cesium from your desktop computer :
+ 
+ - Download the [latest release](https://github.com/duniter/cesium/releases/latest). Choose the web packaging (`cesium-vX.Y.Z-we.zip`); 
+ - Unpack in a empty directory;
+ - Open the `index.html` file in a web browser.
+
+### On web server
+
+Cesium can be easily installed on most web server.
+
+#### Installation script
+
+For Linux distribution, a installation script could be used to:
 
-Cesium can be easily installed on most web server using the following command:
+ - Download the [latest release](https://github.com/duniter/cesium/releases/latest)
+ - Unpack archive into the directory `./cesium`. Existing files will be override.  
 
 ```
 curl -kL https://raw.githubusercontent.com/duniter/cesium/master/install.sh | bash
@@ -21,15 +37,70 @@ or:
 wget -qO- https://raw.githubusercontent.com/duniter/cesium/master/install.sh | bash
 ```
 
-This will download and unzip latest release in a `./cesium` directory.
-Existing files will be override.
 
 **Note**: You may need root permission to write files. If so just replace `| bash` with `| sudo bash`.
 
 
-## Developer
+#### Yunohost package
 
-To contribute and compile cesium, you will have to: 
+There is a [package](https://github.com/duniter/cesium_ynh) for [YunoHost self-hosting distribution](https://yunohost.org).
+
+## Configuration
+
+To change default configuration:
+
+  - Edit the file `config.js`, and set default properties:
+  
+```
+angular.module("cesium.config", [])
+.constant("csConfig", {
+	"timeout": 4000,
+	"cacheTimeMs": 60000,
+	"useRelative": true,
+	"timeWarningExpireMembership": 5184000,
+	"timeWarningExpire": 7776000,
+	"useLocalStorage": false,
+	"rememberMe": false,
+	"showUDHistory": false,
+	"node": {
+		"host": "test-net.duniter.fr",
+		"port": "9201"
+	},
+	"plugins": {
+		"es": {
+			"enable": "false",
+			"host": "test-net.duniter.fr",
+			"port": "9203"
+		}
+	},
+	"version": "0.2.6",
+	"build": "2016-08-25T07:16:49.361Z",
+	"newIssueUrl": "https://github.com/duniter/cesium/issues/new?labels=bug"
+});
+```
+
+  - Configure a Duniter node:
+ 
+     * set `node.host` and `node.port` to the default node address. 
+   
+  - Configure the optional extension for [ElasticSearch Duniter4j node](https://github.com/duniter/duniter4j)
+ 
+     * set `plugins.es.host` and `plugins.es.port` to the default ES node address.
+   
+     * set `plugins.es.enable` with [true|false] to change the default extension state. 
+   
+     * To **remove** the extension (and not only disable by default): remove all content inside the `plugins` tag.
+       Users will NOT be able to enable the extension.
+ 
+## License
+
+This software is distributed under [GNU GPLv3](https://raw.github.com/duniter/cesium/master/LICENSE).
+
+## Development Guide
+
+### Prerequisite  
+
+To build Cesium, you will have to: 
  
   - Installing [nvm](https://github.com/creationix/nvm)
 ```
@@ -51,6 +122,7 @@ To contribute and compile cesium, you will have to:
  sudo apt-get install build-essential
 ```
    
+### Source code
    
   - Getting source and installing project dependencies:    
 ```
@@ -58,28 +130,34 @@ To contribute and compile cesium, you will have to:
   cd cesium
   npm install
   bower install
-  ionic state restore
 ```
   - Installing Cordova plugins    
 ```
   ionic state restore
 ```
 
-  - Compiling and running application   
+### Build environment
+
+ - To configure your build environment :
+ 
+    * Add your environment config into `app/config.json`
+   
+    * Update default configuration, using the command:
+    
 ```
-  gulp & ionic serve
+  gulp config --env <your_env_name> 
 ```
 
-### Manage configuration
+ This will update the configuration file used by cesium, at `www/js/config.json`.
+ 
+### Compile and launch
 
- - To build on another environment :
-   - Add your environment config into `app/config.json`
-   - Run compitaltion using option `--env`:
+  - Compiling and running Cesium:
+     
 ```
-  gulp config --env <your_env_name> 
+  ionic serve
 ```
 
- This will update the configuration file used by cesium, at `www/js/config.json`.
 
 ### Best pratices