looking for a software to make digital watermark

Try Visual Watermark Software - Photo Watermarking Software 2.5

You can d/l it frm *www.softplatz.com/Soft/Graphics/Other/28003.exe

Features:
Visual Watermark Software ... easy to use photo watermarking software ... visible watermarking software ... it places very strong watermarks no one can remove ... it can convert your photos to encrypted PDF ... you control the watermark placement precisely even with photos of different sizes ... this software watermarks photos with logotypes, pictures and text ... command line support ... it can read and write EXIF.

U can use Photo Watermark.