Definitions for "Outlines"
Keywords:  bookmarks, pdf, hierarchy, visual, tree
The term PDF Outline consists of a tree-structured hierarchy of outline items (sometimes called bookmarks), which serve as a “visual table of contents” to display the document’s structure to the user.
Keywords:  delete, database, need, required, part
a required part of a database, so you need to delete the database to delete the outline
ways of organizing information by using headings and sub-headings