Try another version of the hidden undo

Original creative challenge · Digital things that explain themselves

1. Use this invented starting situation: A reversible action looks permanent because recovery is invisible.
2. Place the undo action close to the result it reverses.
3. Make a small artefact that shows the change: a note, sketch, caption, or three-panel sequence.
4. Write one sentence describing what the artefact makes clearer. Keep this an experiment; no account, purchase, or public post is needed.