A watermark is a semi-transparent image that usually contains a logo or seal to identify who created a document or image. If you want to watermark a PDF file, you can either insert the watermark ...

Outlook 2013 supports the inclusion of JPG, GIF, PNG and BMP image files directly in a signature. To add a PDF image, you must include it as a Web link.

Need to edit a PDF document but don’t want to pay for the more expensive Adobe editors? You can add text to and sign a PDF with just the free Reader program.

You can insert one or more PDF files in your PowerPoint PPT presentation to make it more intuitive and informative by these methods.

To convert a JPG file to a PDF file, simply change the file format on your computer's default photo-viewing app.