I have several content types on a site and most of them are user-editable but not user-creatable. However, one content type, Image, allows users to upload a picture. Sometimes, however, users upload the wrong picture and they panic because they don't want that picture to be submitted to the site.
Of course they could always hit the browser's back button, but I'd like to add a Cancel button for additional assurance.
I found this thread that gives various solutions for adding cancel buttons on Drupal.org as well as this feature request for adding a cancel button to D8. However, there are several different general approaches and I don't know how to limit one to a given content type (in this case, my_image).