Watermarks signify ownership of a document and discourage copying. A watermark may be created from any of a variety of sources, including plain text and images. Use the popular Adobe Acrobat PDF-writing software to add add a watermark to a Portable Document Format file. Acrobat can apply a watermark to an entire PDF document or to individual pages within the file.
Click the “Tools” menu and select “Pages” to display a list of available options. Click “Watermark,” the select “Add Watermark.”
Click the “Page Range Options” link to select which pages you want the watermark to appear on. You can apply a watermark to all the pages, to individual pages or to a sequential range of pages. Click the “OK” button.
Select the type of watermark that you want to add. Click the “Text” option in the “Source” section to add a text watermark. Type the desired text into the text field. Change the font, font size and other text properties using the appropriate options beneath the text field. Click the “File” option in the “Source” section to add an image or other file as the watermark. Click the “Browse” button, locate the file and click "OK."