Drag and Drop Activities as shown in Blended Learning training?

During the blended learning session Estee demonstrated a drag and drop activity that can be used for sorting. It seemed like she added images as annotations and they can be moved around as a sorting activity. However, when I tried it my “student” (husband), could not move my annotations so he couldn’t move the images to sort them. It must be some setting I am doing wrong? (Weirdly, using the select annotations tool, he was able to copy and paste the annotations, which is kind of cool.)