There's nothing like a watermark on your photos to let others know they're not public domain. If you have Adobe Photoshop or another high-end photo processing program, adding a watermark is simple.

This is a general method that works in all graphics programs but for this example, we'll be using Gimp. Open your image in your graphics program and select the Text tool. Set the colour of the text to ...

If you have a Mac computer, you don't need Photoshop or any other image editing software to quickly add a watermark to an image. The Annotate option in Preview has everything you need to mark a photo ...