Thanks bcworkz (@bcworkz) for your feedback.
I’m not clear on how my “page contents” is a child Theme. I envision adding the “image viewer” as one of the elements within a Page or Post. I will continue to see if I can find something similar.
Another question, I would like to add either AJAX calls or regular <input….. submit> calls to allow the viewer to modify what is displayed. In my initial search all I find is in AJAX or <input> interaction with wp-admin.
There is nothing saved. The user is adjusting what is displayed.
