To lookup help for a specific menu item, hold the mouse pointer over it and press the F1 key. To get help for a specific window or a button, click the "What's This" icon (mouse pointer with a question mark) and click the item in question. The F1 key in general can be used to get help for dialog boxes, preferences, etc.
By default, the help content will be displayed in an external browser window but can be directed to open in an internal browser window by turning the Scroll Lock on.[v1.0]