Name the Project Simple Quiz or whatever you like.

The new project opens, the first window is created automatically.

At the moment the window is a little small, we will enlarge it. Open the Property Inspector from the Utilities Menu.

First Choose Background from the Edit popup menu of the Property Inspector and ajust the Size of the background, by changing the values in the BackSize fields (as in the screenshot above).
Next Choose Window from the Edit popup menu of the Property Inspector.

Choose Same as Background from the WindowSize popup.

The Window should resize to the size you wish. If you do not want the users to change the size, uncheck the Resizable check box in the Property Inspector.

Now we will build a simple interface for the quiz. Starting with a field for questions