clip art frame 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. The human form has become the subject of art for centuries. Drawings inside cave walls depicting man and woman as stick type figures were early examples of such art. No matter how bizarre the interpretation with the female and male form appears, it's more often than not identifiable. They may be drawn round, thin, short, tall, upright or setting up, with or without faces, with or without limbs and they're still more often than not distinguishable because body of a human.