[Zope] change plain HTML file to page template?

[Steven Hodgen]

How can I change a regular html file to be a page template?  I can't see
anything in properties that would allow this and have even looked at a page
template file to see what's different from manage's point of view and can
find nothing.  Of course, I could create a page template, copy/paste, then
rename, but there must be a property of some sort attached to the file, so
how...

Also, is it possible to create a file from an external source (FTP, etc.) so
that file becomes a page template?  If not, it's sure be nice to not have to
go into the management interface and either create the file, download, edit,
the upload or do the create/copy/paste/rename business.

Thanks!

--Steven