This feature is not available in Reader.
Acrobat users can specify one or more files to use as headers, footers, watermarks, and backgrounds. This feature modifies the EnterpriseFiles installer table.
Files for these features are stored by default at <intallation root>\Adobe\<product & version>\<product>\DocSettings\. You can also use the Files and Folders feature to add these files.
You can add or remove watermark settings from the installed application.
To specify a watermark settings file:
The settings file appears in the Watermark Saved Settings list.
To remove a watermark settings file from the list, select the watermark XML file you want to remove and choose Remove.
You can add or remove background settings from the installed application.
To specify a background settings file:
The default XML file location is <installation root>\Adobe\Acrobat<version>\Acrobat\DocSettings\Background.
The settings file appears in the Background Saved Settings list.
To remove a background settings file from the list, select the background XML file you want to remove and choose Remove.