Understanding How ePublisher Works : Understanding Stationery, Projects, and Overrides : ePublisher File Types : Stationery .wxsp File
 
Stationery .wxsp File
A Stationery .wxsp file is based on settings and options defined in a Stationery design project and saved as Stationery. By saving a project as Stationery, all the settings and customizations that you captured in your project, including project format overrides, are automatically implemented in any new projects based on the Stationery.