This is a follow-up to my previous question, How to get all the properties of a site page using the REST API? When using REST in an AngularJS application, I was able to read the properties of the Title Bar of the web part page and see if the property of the image was populated. Now I realize that I have to EDIT the property too.
Can I use the REST API to edit a web element? Or do I need to use CSOM? I have used CSOM in the past to edit the User Information List (because that is a list that can not be edited with REST). But I'm not sure how to proceed.