The left portion of the window shows a structure map containing graphic symbols for the status of each part in the order. If it is a structure order, the main part appears at the highest level, and all the underlying parts are shown underneath this level if you maximize the structure. If there are additional parts on underlying level, you can also maximize the structure map to see them as well.
This structure map and the symbols that are shown in front of a part are the same wherever they appear, and can also be found in the other procedures. You will find a key to the different symbols for the part's order status in the Help Function for the Order Info procedure, the section Structure map.
By using the Info menu (when right-clicking) you can choose to maximize/minimize underlying levels in the structure map.