Hi all, Assume I have a ZPT documant that looks like this: <html xmlns:tal="http://xml.zope.org/namespaces/tal" xmlns:metal="http://xml.zope.org/namespaces/metal" metal:use-macro="here/StandardLookAndFeel/macros/master"> <head> <title tal:content="here/title">The title</title> </head> <body bgcolor="#ffffff"> <div metal:fill-slot="main"> <h1>UserList</h1> </div> <span tal:define="def_dn string:o=cm;dn request/dn | def_dn" metal:fill-slot="userList_slot" tal:content="structure python:here.userList(dn=dn)"> User List goes here </span> <p tal:content="structure here/ZopeAttributionButton"></p> </body> </html> This works fine and dandy, but can anyone think of a way in which I could replace the metal:use-macro="here/StandardLookAndFeel/macros/master"> line with something like metal:use-macro="here/StandardLookAndFeel/macros/$master_template"> , where master_template is a variable, maybe a session variable or similar. This would open up the possibilities no end, imagine skins using ZPT. Anyone have any ideas? Phil