How to save image that is attached/embedded in received email?

I am receiving emails with photos. I can’t see how to save the photos to my hard drive. I can’t double click on the photo to view on its own. Please help.

right-click on it and choose ‘Save image as…’ option

Your suggestion of right clicking the image and choosing ‘Save As’ is logical, but for some reason it doesn’t work.

How do you save a picture sent in an email- not the entire email, just the image?