Upsale products are controlled by four pages in the admin interface:
Page OUS1 controls the screen where a customer is being offered a single upsale product. The content of this page is controlled by the template code on OUS1, in the Page tab, in the Details section. If the upsale product has attributes, they are controlled on OUS1, in the Page tab, in the Product Attribute Template section.
If the customer clicks on one of the buttons (Add to Order or Do Not Add to Order), at the bottom of OUS!, and the attributes of the upsale products are required, the customer will be taken to page UATR.
Page OUSM controls the screen where a customer is being offered multiple products. All of the content on this screen is controlled by the template code on OUSM, in the Page tab, in the Details section.
On OUSM, the customer cannot select attributes for the upsale products, even if they are required. The user clicks the Continue button and then goes to the next screen, which is UATM.
Page UATM controls the screen where a customer has been offered multiple products and needs to select attributes for those products. All of the content on this screen is controlled by the template code on UATM, on the Page tab, in the Details section.