Definition(en): AP files are layout documents created by Esko ArtPro software, which is a prepress print editor. They contain the ArtPro project, including the layout, layers, text, colours, and barcodes of a design. AP files are used in packaging design, enabling the user to create the exact layout of your design using images, and view a 3D preview of their project. AP files are native to ArtPro, but are based on the PDF standard.