These variables are always globally available in the CMS:
website: the current Websiteuser: the current Usercart: the current user's Cartpage: the current CMS Pagerequest: the current HTTP RequestSome variables are only available on specific URLs.
When the URL path has the form /site/pagename/c/my/collection/path:
collection: the Collection object with path my/collection/pathWhen the URL query string contains a theme parameter with the value of an ID of a design, for example: /site/design?theme=123:
design: the Design with ID 123When the URL query string contains a product parameter with the value of an ID of a product, for example: /site/product?product=123:
product: The Product with ID 123