Whenever the manual instructs you to select an item from the “context menu”, it means that you should right-click (or [Ctrl]-click if you’re using a Mac with single-button mouse) on the specific area, section or device, and then select the item from the pop-up menu that appears - the context menu. The item list in context menus varies depending on where in the application you click. See “Context menus” for an overview of the context menus in Reason Intro.