Final answer:
A printed line that surrounds the outer part of a page is called a page border, which is a decorative element different from page margins.
Step-by-step explanation:
The printed line that surrounds the outer part of a page is referred to as a page border. This is a design element often used in document formatting to add a decorative or professional look to business documents, academic papers, or personal stationery. Page borders can come in different styles and can be applied using word processing software, such as Microsoft Word or Docs. Unlike page margins, which define the space where the text should not exceed, the page border is purely decorative and does not necessarily affect the layout of the text, except to provide a visual frame for the entire page.