If you have other open dialogs (like while creating a new table) they will be listed here. Clicking on the name of the window will force it to the front of the application.

We have modified most of the dialogs to also show in the taskbar, but it is also useful to be able to see a list of all open windows for the application.

This menu shows two other dialogs are open from this database. Choosing one would bring it to the topmost window.