It's the single, simplest, legal thing he can do. Without playing 20 questions and trying to determine what exactly he was trying to accomplish, I went with simple.
I offered 1 solution.
You offered a solution.
I'm sorry if my solution somehow detracted from yours.
Do a Google on TSR Watermark. You can download it for free, or you can pay for it...your choice. And it's really slick...works like a charm. Been using it for the past 3 or 4 years now.
Since I use Photoshop CC, I always make my watermarks on each photo just before I save them. This way, I can select the color, vary the opacity and even add layer style to them (drop shadow, bevel&emboss). This way I can kind of blend the watermark with the picture so it doesn't distract from the image itself.