Adding cart notes to the Minimal Shopify theme v3.2.0

I recently opened a development Shopify store to set up a new storefront for my side business that mainly sells through Etsy right now. I chose to use the free Minimal theme, and I wanted to enable cart notes to allow customers to leave special instructions with their orders, especially for customizing decal colors. Shopify only allows 100 variants with a single item; as a result, for a decal that has 8 size and 20+ vinyl color choices, 100 is nowhere near enough.

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Shopify helpfully had this great article “Enable order notes on your cart page”, and it claimed that I could edit the cart settings for the theme on the Customize theme page. However, when I tried to follow the instructions, I was faced with this:

NO CART SETTINGS.

A browse through the forums was no help, but with a glance through the raw code, I quickly managed to figure it out. (more…)