Template - LiruJ/GuiCookie GitHub Wiki
A template allows for an element to be defined once and reused multiple times and in multiple layout sheets.
Templates are treated as collections of nodes and attributes, directly reflecting the XML data. Templates can override each other's attributes and children endlessly, allowing a base template to be used in numerous ways. When a template is used in a layout sheet, its attributes and children can also be overridden, which allows for an element to be defined once as a template then reused all over the project.
See the List of Default Templates to see all default templates available in GuiCookie.