I created this page by
1. writing the css div called "fullpage", so that I had someplace to put the picture.
2. Taking s selfie, opening in Photoshop, cropping to 16 x 9 proportions, changing to 1400-px wide, and saving as a .jpg to the "images" folder of today's website.
3. In Dreamweaver, choosing insert image and finding the image in the images folder.
I added "alt text" to the image.
Alt txt is read by the browser to help visually-challenged users. Google is visually-challenged (no eyes) and can't see the picture, but can read the alt text.