The Windows menu

See which Windows you have open

The Windows menu gives you a list of all windows that are currently opened and pinned to the main HelpMaster window.  Unpinned windows will appear as a separate or grouped icon in the Windows taskbar.

You can switch to any listed window by choosing it from the Windows menu.  You also have the option to open windows in a cascade, tile them horizontally or vertically, or close all open windows.