The margin is the area between the main content of the page and the page edges (or spread and spread edges). Margins are shown as a blue solid line by default, but this colour can be changed. Margins can be set evenly or unevenly depending on the page orientation.
Page margins are set up with each new document when it is created, and can then be edited at a later point via Document Setup. Margins can also be inherited from any assigned master page, replacing the page's current margin settings.
When determining the size of your page margin, it is important to consider how text-intensive the design will be, as well as the page layout and orientation. For printing purposes, you may for example consider allotting additional space to the inside margins of facing pages so text does not disappear in the page gutter.
Design elements positioned outside the margins may not be printed.
Margin positions can be defined manually or by using the settings of an installed printer. They are non-printing and non-exporting.