diff --git a/docs/assets/webapp/downloads.png b/docs/assets/webapp/downloads.png
index 80bdb73709859c667d0da3ac71cdce34fdf5a883..4ad624160407b4326a1fa2e69ec5d72ee97e5d31 100644
Binary files a/docs/assets/webapp/downloads.png and b/docs/assets/webapp/downloads.png differ
diff --git a/docs/components/custom-apps/web-app/dataset/downloads.md b/docs/components/custom-apps/web-app/dataset/downloads.md
index ada412a0f06d2caf56e356bfeeba1900b15564e6..a83bd696fc11d6f3debb50cb46fc1c3d43deb047 100644
--- a/docs/components/custom-apps/web-app/dataset/downloads.md
+++ b/docs/components/custom-apps/web-app/dataset/downloads.md
@@ -1,15 +1,26 @@
 # Downloads
 
-## From API
+## From the API
 
-In the first section, the files are created by using the API.
+In the first section, the files are created by using the API (see [here](./api.md))
 
 ![Downloads query](../../../../assets/webapp/downloads.png)
 
-For example a PNG file is created by querying the WMS service with specific paramameters. Then the response is converted into a `blob` to allow the browser launch the download.
+Depending on the format and the dataset, it is possible to modify the localization (municipality) and the projection system.
+
+For each format, it may have 0, 1 or 2 parameters to download the file:
+
+* datasets with an `insee` code have the option to choose the municipality
+
+* for files retrived from services allowing multiple projection system as output (for example `WMS` or `WFS`), it's possible to choose the projection system
+
+* for a file format with no projection system (for example JSON of the non-standard `WS` service), and a dataset with no `insee` code, no option are provided
+
+Once the user clicked on the `Download button`, a file is created by querying the WMS service with specific paramameters. Then the response is converted into a `blob` to allow the browser launch the download.
 
 ## Static and other resources
 
 ![Downloads other](../../../../assets/webapp/downloads-2.png)
 
-Any other resources like static files (eg a `.csv` or `.tiff`) or an url are listed in two other sections as seen in the figure above.
\ No newline at end of file
+Any other resources like static files (eg a `.csv` or `.tiff`) or an url are listed in two other sections as seen in the figure above.
+These files are raw resources (document or link), and cannot be configured as the resources using the API. 
diff --git a/docs/components/off-the-shelf-apps/elasticsearch.md b/docs/components/off-the-shelf-apps/elasticsearch.md
index 7af3f92af6d975b0efb100c76693ef71355e082d..cbb9f5d8e2277c37e28af1dee49a2c65cf50f9c2 100644
--- a/docs/components/off-the-shelf-apps/elasticsearch.md
+++ b/docs/components/off-the-shelf-apps/elasticsearch.md
@@ -1 +1,24 @@
+# Elasticsearch
+
+## Data storage
+
+## Multiple indexes
+
+- [metadata and data](../indexers/metadata-and-data.md)
+- [editorial content from Ghost](../indexers/editorial-content.md): posts and pages
+
+## How the content is used
+
+### Search
+
+### Autocompletion
+
+### Suggestion
+
+### Editorial content
+
+## Aliases strategy
+
 Quid de la couche AUTHZ ?
+
+## Multiple instances