EXD.3:4.3 - Preserve a usable reading path
Make the current question, selected relation and answer reachable in the chosen form. Expose the condition that changes the answer at the point it becomes consequential. A short answer may point to a fuller derivation; the recipient must know when that return is needed.
Provide usable labels and correspondences through the actual available channel. If color carries a distinction, include another cue that lets a recipient recover it without that color. If a static diagram cannot show a temporal dependence clearly, choose a warranted sequence or accompanying account. Where another modality is unavailable, retain the contribution in a form the recipient can use.