[Zope] Going Back

What, if any, resources are available in Zope (2.6) for me to use to construct "back" buttons/links. Is the page I came from stored anywhere, or can I access it? Is there such a beast as a "back" input type (similar to "submit" or "reset")? If not, how can I set up a "back" button/link? Thanks for your help, --greg