Mike, PDF is a multi-page format, while JPG/JPEG is not. The former is typically used for documents, while the latter is obviously used for images. Certainly, a document page can be converted to an image, but the file format will support only single pages per filename. If you require to have image format for a multi-page document, look for a PDF to TIFF converter, as the TIFF format supports more than one page. It is often used for fax "collection" which is frequently more than a single page.
