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 ...

How to Convert a PDF File Into a Photo for Facebook Uploading. If you want to share a PDF such as a quarterly report on Facebook, you can just upload it as a document to a Facebook group.

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.