Odoo’s web client, or backend, is the place where employees spend most of their time. In Chapter 10, Backend Views, you saw how to use the existing possibilities the backend offers. Here, we’ll take a look at how to extend and customize those possibilities. All the following code will depend on the web module. Note that at the time of writing, there exist two versions of the web module for Odoo 11.0: the community version and the enterprise version, which are quite different from each other, even though they share the same name. We’ll only talk about the community version here.