The default page or index page for the application

How can I define the default page (index page) for the system that will be load when the user type the address of the website? For example : www.myapplication.com and I wanted to build my index page using bootstrap framework but I wonder how will I modify the menu to meet my will

When you deploy your application you need to specify the main application. Within the development environment this is not used so I can imagine the confusion.

so what I can do is after finishing the project in scriptcase environement I make an index(default) page outside?

Seeing the amount of basic questions you have I advise to watch the youtube videos first. It looks like you havent seen those. They do explain all the basics.
Please check out http://www.scriptcase.net/scriptcase-documentation you will find the videos and demonstration and so on there.

Thanks a lot !!! but the problem was with the manual which is not written well. I’ll check the videos