Watermark files are physical files on your hard drive. All watermark files must be stored in folder "My documents\My watermarks". Watermark files have an extension .wmk. It is proprietary to PhotoWatermark Professional and cannot be opened with other programs.
Each watermark file can contain any number of watermarks of any kinds.
For different watermarking purposes, you can create several watermark files. To switch a file is just a single click.
Watermark files can be deleted and renamed to meet your specific needs. Commands are under File/Watermark file.