Tutorial 5: Customizing INVO ============================ To finish the detailed explanation of INVO we are going to explain how to customize INVO adding UI elements and changing the title according to the controller executed. User Components --------------- All the UI elements and visual style of the application has been achieved mostly through `Bootstrap`_. Some elements, such as the navigation bar changes according to the state of the application. For example, in the upper right corner, the link "Log in / Sign Up" changes to "Log out" if an user is logged into the application. This part of the application is implemented in the component "Elements" (app/library/Elements.php). .. code-block:: php set('elements', function(){ return new Elements(); }); As controllers, plugins or components within a view, this component also has access to the services registered in the container and by just accessing an attribute with the same name as a previously registered service: .. code-block:: html+php