This article explains how to protect digital photos by adding a watermark. It also covers desktop watermarking software, phone apps, and general tips.
Stop watermarking your photos
Follow these steps to add a watermark to your photos.
Select the photos. You only need to watermark photos that will appear in a public location on the Internet, where others can easily download them. Additionally, you only need to watermark photos that you don’t want others to take and use without your permission. So, don’t feel obligated to watermark every photo you’ve ever taken. Instead, save yourself some time by selecting only specific photos for watermarking.
Make copies. You don't want to put a watermark on the original and only copy of your photo. Make copies of the images you want to watermark, and then put the watermark on the copies, thereby protecting the original photos.