if you need create or edit watermarks , ican give you some advices , you can try this imaging sdk which contains such a function. it can be applied in c#, vb,etc. Install it and it becomes a selectable processing option.Then you can
create and edit watermarks in any program at all, including Adobe Acrobat . Just open the images, select watermark ,and follow the setps given in the sdk, the task will be finished in several seconds.you can then zoom in and zoom out , or adjust the light of the watermark on your own will. if you haven´t found a good choice , you can have a try. best wishes.
☆ A M B ☆
