By default, the order form will display 10 products per page. This is a pretty common number to load initially and it also applies when the customer is filtering or searching for products. You can choose between pagination or lazy loading style to load your products.
To change how much product loads per page for the order form go to its Pagination settings or click the small gear icon by the pagination column head over to the Options settings that are located on the right side of the screen and set the number of products per page.
Lazy Loading or Infinite Scrolling
If you prefer the user scrolling down to find products, you’ll want to enable the Lazy Loading feature. To enable this click the settings for the form and click the Lazy Loading checkbox.