it is not possible to add a picture to the thanks page in feedback

create a new feedback instance insert a picture into the page_after_submit editor field save the new instance update the instance add another picture into the page_after_submit editor field save the instance open the feedback instance. The pictures should be shown at the overview page add one or more questions complete this feedback. At the end the page_after_submit page should be shown backup the course including the feedback instance restore the course including the feedback instance doublicate the feedback instance inside the course