Zend_Layout is the Zend Framework implementation of the composite view design pattern. It allows us to display default content for specific parts of a page (Menu, header, etc), and be able to display specific content for the current action.
In this article we assume the use of Zend_Application, we can check Using Zend_Application for bootstraping if necessary.
To start using Zend_Layout you have to add a line to the application.ini specifying the path of your layouts folder and another line to create a view resource. It should look something like this: