This tag changes the template of the page to something other than the default template. It is not necessary to put this tag at the top of every page -- those using the default template do not require additional tags.
 
Example:

PC:USE_SPECIFIC_TEMPLATE:GlobalHouston:Testing The Bridge
 
where GlobalHouston is the Site Template and Testing The Bridge is the name of the template.
 
This can be done also by choosing from the drop down menu : Site Template and Name from the group of selection.