In the editor window fill in the text fields and click the add button. You can select menu items in the list box and use the four arrow buttons to move menu items and change their level. Click the "Apply" button in the properties window to see a preview of your menu.

Click the "File" menu then "Save As" and save it in the same directory as the web page you want to use it in. The file name you give in the dialog box will the file name of the configuration file with a .js extension. There will also be another script file and image files copied into that directory.
Click the "File" menu then "Get HTML Code". Open your web page in a text editor such as "Notepad" and copy the code from the "Get HTML Code" window into your web page.

If you have a problem with the drop down menu that you can not find an answer to in the documentation or if the documentation is unclear at any point then please send an email to chris@dhtmlmedia.com