The print quality of the printed output depends on the media. When you add media to the media catalogue, you define attributes that influence the print behaviour of the print system for these media. (Learn about the media-based workflow)
When you notice that output media in the output tray is curled, perform a correction procedure to prevent curled sheets. (Correct curled output media)
When you notice that the media quality of the printed output is not according to your expectations, perform a correction procedure to adjust the media registration. (Adjust the media registration)
The correction procedures change the media attributes in the media catalogue, so that the adjustments are applied to all jobs that use the media.