How can I place an image or other object behind a 3D model, like layering in other applications?

Casey_Hicks Community Member, Lectora® Accessibility Group (LAUG) Member, eLearning Brothers® Partner Posts: 2 ☆ Roadie ☆
I am trying to place an image behind a 3D model to help highlight it better. I am having no luck, even with the 'Send to Back' in the context menu. This seems to have no effect and the 3D model remains behind everything else in the scene. Am I missing something?