Ortelius delivers with templates for backgrounds, blank standard paper, and several world, regional, and country outline maps. When you first open Ortelius, the Template Chooser is shown by default. Included templates are of varying paper sizes and designs, some of which are sized for poster (tiled) printing or can be shrunk to fit to a single page upon printing.
When you save a drawing created from a standard or custom template, the modifications will not affect the original file. That is, the template itself remains untouched.