All windows include a title bar across the top. You can assign a caption and display it in this title bar. For your main Help window (the HTML Help viewer), the caption identifies the title of your project (for example, "Windsurfing"). You can also use a caption to identify the purpose of the window. For example, a context-sensitive Help window might use a caption such as "Help for."
From the File menu, select Project Settings.
Click the Windows tab.
Select the window you want to customize and click Properties.
If you did not design a custom window for the project, select NewWindow (the default window).
In the Caption text box, enter the title for the window.
Tip: You can rename the window by editing the text in Window Name. For example, if you did not design a custom window for the project, you can rename NewWindow to a unique name, transforming it into a custom window.