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Ability to watermark multiple photos at the same time would be a lifesaver for photographers. Check out SmugMug’s go to on this. Please incorporate same thing.
adding my vote too!
several people want this on the community forums, it would be so useful!!!:
https://www.dropboxforum.com/t5/forums/searchpage/tab/message?filter=location,includeIdeas,includeForums&q=watermark&include_ideas=true&location=category:English&include_forums=true&collapse_discussion=true