I made a mess of my custom product template. Can I start it over?

Yes, you have two options while editing the template:

• ↶ Undo (or Ctrl+Z) steps back one change at a time, and ↷ Redo steps forward again.
• Reset to starter replaces the whole layout with the starter design for that page type. A confirm box appears first, and you can still Undo the reset afterwards.

Nothing is final until you click Save Layout. If you leave without saving, the last saved version stays.

To keep a copy before experimenting, click Clone on the template under Settings → Appearance → Product Templates first.