I have a flattened/simplified version of my site's logo built in illustrator at the same time the enhanced version was created several years ago. I'd like to use it as a white watermark some degree of opacity, not too intense but noticeable, that is positioned in the lower-right corner of every full-size image. Already utilize ImageMagick with the PECL extension installed as the standard attachments setting. My plan is to simply enable it, do a couple tests, and leave it for a week and let it add to just the new images uploaded by users. Then go back and re-process the images if everything looks good. Any suggestions on watermark image size, resolution, image type would be appreciated. Also, what opacity setting in XFMG (50 or something different).