[Zope] ZPT Newbie Question

Hello all, I'm starting to learn ZPT in Zope and I have a question. Can I make ZPT includes in my templates, like I can include dtml . I want to use some template code in all the rest of the templates in my application, is there a way to include this or I need to copy the code in every document? Also like in php when you include a php document to use it in several php documents. thanks in advance Gerardo Amaya