When you are using many tab sheets within QlikView your application can easily become unclear and very full. Using standard tab sheets it is not possible to build a hierarchy in your menu.
I have built a dropdown menu extension that allows you to build a hierarchy within your menu and manage multiple tab sheets in a structured way. The menu is easy to install and use, you can configure it from within your QlikView application.
You can find documentation, a sample qvw file and the extension itself at the following location: