If you want to buy a product which contains more than one photo (eg 'Buy 3 hi-res files get a 4th FREE), if search by number ISN'T available on a particular event,you MUST create a 'Set of Favourites' of the three/four/five photos you want so that they are available to create your product.Click here to see a quick video on how to complete the product purchase on a Mac/PC, or click here for Smart Phone.