[Zope] ZPT Newbie Question

[Jose Gerardo Amaya Giron]

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