Final answer:
To display the "No cart" option in a catalog item form, simply uncheck the "Use cart layout" checkbox in the form's properties or configuration section.
Step-by-step explanation:
To show the "No cart" option in a catalog item form, you must uncheck the "Use cart layout" checkbox. This action hides the cart layout that is otherwise presented to users when selecting items from a service catalog in systems like ServiceNow.
You can typically find this checkbox in the properties or configuration section of the form where catalog items are being set up. By unchecking this option, the item can be ordered without adding it to a shopping cart, allowing for a simpler and direct ordering process.