The back panels of the wall bed vary by model. Only some reveal an exposed section of wall; these are low profile, and the depth may be too limited to allow for a picture frame. Others are deeper and feature a trinket shelf or two; these are perfect for propping up some art or other decorations.
Regardless of the style, we do not recommend that anything be hung on the panels themselves, as vertical panels are not tested for a weight capacity. This means that no Command-style adhesive hooks or more permanent drilled hardware for hanging should ever be used, inside or out on the wall bed itself.