Plone question

[KH]

Sorry, if this is the incorrect forum for this post; I couldn't find a 
better one.

I'm just learning to use Plone/Zope and I'm trying to create a form in 
one of the plone documents.  Needless to say, creating an HTML document 
and putting the code <dtml-var URL0> is blank, and no other dtml related 
variables seem to be doing anything.  Wondering if this is maybe a 
simple configuration or user-error issue?  Thanks~

/KH