Use this dialog to set the facets of the current project.
You can access this wizard in one these ways:
Facets are used to specify the type of project, add standard libraries, set compiler options, control publishing tasks, set the build path and/or add an annotation processor. The facets that are displayed will vary depending on the type of project. Required facets cannot be unselected . Simply click the checkbox beside the facet name to add it to the current project.
See Using Project Facets for more details.