how does new media differ from pop art To walk into a store or browse a website to see and verify something and preferable writhe an inspection, use a plastic card or pay cash to the merchandise being advertised. PDF: Stands for Portable Document Format which is used mainly for documents. PDF file format preserves fonts, page layout, and also other document information and will be imported into Photoshop for editing. PDF files are platform independent, meaning almost any computer OS can be used when opening them. PDF files aren't used in Photoshop for creating artwork.