Per-Product and Per-Category Direct Checkout Settings

Each product has its own Direct Checkout panel in Product data on the product edit screen. Settings there win over the global ones for that product.

SettingWhat it does
Add to cart behaviourUse the global setting, or turn direct checkout on or off for this product.
Redirect toIts own redirect URL after add to cart.
Buy Now buttonShow or hide Buy Now on this product.
Button text / Button colourIts own Buy Now text and colour.
Redirect after Buy NowCheckout, cart or a custom URL for this product.
Default quantityHow many units Buy Now adds.
Popup titleIts own Quick Order popup title.
Disable popup checkout / Disable sticky buttonTurn the popup or the sticky bar off on this product.

Categories have a direct checkout switch on their edit screen. With the scope set to Individually, only the products and categories you switch on use direct checkout. The products list shows a column with each product’s setting.