Due to the fact that eZ Platform is built using the Symfony 2 fr= amework, it is possible to benefit from most of its stock features such as = Bundle Inheritance. You should check out the related Symfony documentation.
Bundle Inheritance allows you to customize a template from a parent bund= le. This is very convenient when creating a custom design for an already ex= isting piece of code.
In this cookbook we will create a customized versi= on of a template from the DemoBundle.Create a new bundle to host your design using the dedicated command (fro= m your app installation):
php app/console generate:bundle=20
Following the related Symfony= documentation, modify your bundle to make it inherit from the "eZDemoB= undle". Then copy a template from the DemoBundle in the new bundle, followi= ng the same directory structure. Customize this template, clear application= caches and reload the page. You custom design should be available.
If you are experiencing problems with routes not working after adding yo= ur bundle, take a look at this issue.