This add-on allows you to watermark all images saved via the attachment system. You have 100% control over who sees the watermark and which attachment types it is applied to. Of course, the original image is never changed, as with other Wassermark add-ons or also at the Media Gallery...
With this add-on, the image attachments in posts are watermarked.
This happens on-the-fly and always in copy. So that at no time the original image is changed.
Permission and node based
This version is still at an early stage. The first extensive tests were stable and satisfactory. So we are...