Interface designs — screens laid out as they would look in a product.
Properties
These are the fields this surface accepts. They matter when you build one through the API; the work sets them for you otherwise.
What you can do
When this is chosen
The work picks the surface that fits what it produced — you do not have to ask for Mockups by name. If it picked the wrong one, you can move the result to a different surface from the interface menu.