What extra clue does the diagram give?
My own try
Read the whole different source
A pretend poster says Fold on the marked line. Its full diagram description is a rectangle with one dashed horizontal line halfway down the drawn page, labelled Fold line. A dotted flower border is separate. No equal-parts mathematics is judged.
Adult reads the whole source neutrally when wanted; exact child-directed recording, pointing/sign/AAC/drawing/type/speech remain available. Match print separately; no voice/neatness/speed gate.