watermark

You can use Preview to create a watermark, including your signature. Find it in Applications if not already on your dock. Details Use the Preview app to view and edit images and PDFs - Apple Support

Once you have your imported your image, click the blue briefcase in the toolbar. This opens a suite of editing tools. When you have created a 'watermark', as either text or a signature, it stays available to click and place on any images. This shows my initials. You can resize, change colour and drag the watermark to any position.

I own Affinity Photo (Mac App Store, $50USD, free trial) that offers Extensions that once selected in System Preferences : Extensions : Photos, will enable you to select an image in Apple's Photos application, and then edit it in Affinity Photo. One you have that image open, you can add a watermark as shown in this 5 minute, Affinity Photo video tutorial.

Gary,

I doubt that Apple set out to make things purposely awkward with the creation of the Photos application, but on the otherhand, they are not creating professional grade applications for free either. Adobe Lightroom comes to mind, which I believe does have photo watermark capability.

Of course, when was the last time that an Apple product manager or engineer stood over our shoulders and watched our practical workflow needs. 😉

There are clearly free tools to watermark images too.

And of course iPhoto did not have a watermark feature either - and iPhoto did not have nearly as robust an extension capability as Photos has so third parties could easily add feature - some people are so arrogant that they believe any feature they want has to be included and Apple is crap if they do not read their mind and offer it - they need to simply use software that they do like rather than gripe that their personal desires and not individually catered to - Watermarks are probably in the bottom 5% of "missing" feature mentioned by users here - basically no one cares about watermarks and if they do there are easy solutions available

Bottom line - Photos is much better than iPhoto and over time is becoming close to a professional program although not there yet

LN

You could do lots of things as the many helpful answers have suggested - but the OP is only interested in throwing a tantrum and demonstrating their poor vocabulary so that is what they are going to do

I've alternatives. If Apple makes it this awkward - screw it.

LN

I liked the way I could do it in Aperture. Just add the watermarks to the export presets, and I could export the finished photos from Aperture with or without my watermark, properly scaled for each purpose.

There isn't a way to do a true watermark in Photos (you can add text with Markup, though).

Search for a 3rd Party App in the App Store, or Google.

You could use the Markup Photo Editing extension, that is available in Photos 2.0 on Sierra. You can draw or ad text to a photo this way.

It is for the benefit of others who come across this discussion while searching. 😁

BTW, I cannot recommend the Watermarker Tool Extension. It is not very intuitive to use.

For any photographer needing to Watermark a lot of pictures, it's better to get a 3rd Party Tool that can batch Watermark and add it to their workflow before the pictures are added to Photo

That makes the most sense.

Maybe a future enhancement to Photos 🙂