This package provides an easy and flexible user interface to customize page layout, implementing auto-centering and auto-balancing mechanisms so that the users have only to give the least description for the page layout. The package knows about all the standard paper sizes, so that the user need not know what the nominal real dimensions of the paper are, just its standard name (such as a4, letter, etc.). An important feature is the package's ability to communicate the paper size it's set up to the output.