The Search Form of the Where-Used Configuration procedure is actually the left portion of the window.
It contains a table in which you can enter the part number you want to view. You can also decide how many higher levels you want to include. The standard default is maximum one level. You can also choose whether the structure map should be Maximized (fully expanded) or not.
The Search Form also contains a key to the color symbols that represent the different part types that can be viewed in the structure map.
To the right of the Search Form there is a structure map, with a graphic display of all parts in which the selected part is used after you have selected Load structure under the window functions.