But that's not all... you can enable a number of fixed width fonts if you really want to. (howtogeek.com)
Refer to Fixed - Layout Properties [Packages 3.1] for information on how to designate that a Rendition, or its individual spine items, are to be rendered in a pre-paginated manner (i.e., with fixed width and height dimensions). (idpf.org)
This product is consisted of a series of bars that are set apart at fixed widths. (thankyourbaby.com)