The following picture shows a typical AQT window, and the various components on that window:
the menu bar contains most functions that can be invoked from this window.
the toolbar provides single-click access to common functions. You can customize the toolbars used by AQT.
the status bar shows information and error messages. In many cases, if AQT has an information or error message it will not use a popup box (as these can be annoying). Instead the message is written to the status-bar. For this reason, it is often a good idea to keep an eye on the messages that are written to this.
Sometimes the status bar has a long message that can't all be seen. If you click the status bar you will be shown the message in full.
the window-list bar provides an easy way of navigating between AQT's windows. Clicking on a button in the window-list bar will take you that window. The window-list bar is described in more detail here.