Display rules decide on which products Buy Now appears.


- Hide for Out-of-Stock: no Buy Now on products that cannot be bought.
- Show Only for Sale Products: for flash-sale stores.
- Restrict by User Role: logged-out visitors, administrators, customers and other roles; empty shows it to everyone.
- Product Types: simple and variable. Grouped and external products cannot be bought in one step, so Buy Now never shows on them.