Jack from OpenThinking here!
You can edit the appearance of Checkout pages only if you're on Shopify plus plan.
let me know if this works for your. If yes; accept my answer and give me thumbs up! Thank you.
Hello @thorathletics !
While the online checkout cannot be customized, you can definitely enable order notes on your cart page. When you do so, customers will see a text box on the cart page where they can enter details prior to proceeding to checkout.
- From your Shopify admin, go to Online Store > Themes.
- Find the theme that you want to edit, and then click Customize.
- Click Theme settings.
- Click Cart.
- Look for Enable order notes or Enable cart notes. If you can't find either of these options, then check your Cart page.
- Check Enable order notes or Enable cart notes.
- Click Save.
Hope this helps!