If you press the Add New Item button or select it from the pop-up menu, the window below will appear.
There are four different ways to add a new item to the window list:
The TaskBar Target:
The Taskbar Target is a shortcut for adding windows to the window list. When you click it, with the left mouse button, a message box will appear and ask if you want to add the current window to the window list. If you press Yes, it will, otherwise it will disregard the click. The Taskbar Target, when clicked, asks to add the currently "active" window.
The Target:
To use the target, click and hold it, then drag the crosshair cursor to the title bar of the window you want to add to the list. After that, check to make sure you have the right one by looking at the text in the custom title box, if so press add.
The Custom Box:
Type a custom title in the text box, or edit a selected one.
And, the list:
Select a window from the list box.