Theme setup & troubleshooting

Theme compatibility, advanced settings and fixes for common problems.

• How to use the advanced theme settings in EZ PreorderEvery field in EZ Preorder's Theme Settings explained, with defaults - selectors, hidden elements, Variant switch override, Custom JS, delay, spinner and reset.
• I cannot add a preorder product to the cartWhen the EZ Preorder button shows but the cart rejects the item, fix the Shopify purchase options or Continue selling when out of stock setting.
• I cannot add more products to the preorder listWhy EZ Preorder stops you adding products - the Free plan limit, the older one-product free plan, Bulk actions on Core and above, or a very large preorder list.
• The preorder button does not update when switching variantsIf the EZ Preorder button stays wrong after a shopper picks another variant, choose your theme preset, turn on Variant switch override, or ask support.
• The preorder button is not showing on my product pageFix a missing EZ Preorder button. Check the app embed, the preorder list, the variant's rule and stock, plan limits, then your theme settings.
• The product on my preorder list does not match ShopifyEZ Preorder's Sync removes variants you deleted in Shopify. New variants are added with Select products, and the list keeps the name and image from when you added it.
• What Shopify themes work with EZ PreorderEZ Preorder works with most Shopify themes. 358 themes have a preset you can pick in Theme Settings, and the app matches your live theme to one when you install.
• Why a product still sells after its preorder is turned off or endsOut-of-stock products keep selling when Continue selling when out of stock stays on. Which EZ Preorder actions leave it on, and how to turn it off in Shopify.