How can I change the background color in a project? I knew how to do it using version 3.0 but now im using 4.0 and I cant figure it out. 
Go to the menu WINDOW>SCENE MANAGER to open the SCENE MANAGER panel, then on each scene, highlight the scene and right click to open the context menu and select PROPERTIES. In the scene properties dialog you click in the box next to the BACKGROUND COLOR and select your desired color for that scene’s background and click on OK. Every scene can have a unique color if desired. -JK