There are two templates uses for page layout:
weblayout_form
weblayout
Each layout template serves as a container for all the components of a given web page, including the doctype declaration, html header, and body sections. Both layouts contain an html form declaration. The weblayout template has a default form action, while the form action in the weblayout_form template is set via javascript.
The templates used for a standard web page are listed below. The indentation shows which child templates are included in a parent template.
Weblayout_form Template
Head Template
Header Template
UtilityBox Template
Legend Template
Messages Template
BodyContent Template
Footer Template