The GUI is comprised of several docking widgets, each covering features and functionally to control, calibrate, and operate the system. You can find all available docking widgets under the View menu, and the most common widgets available in the toolbar.
All docking widgets comprise of a 'float' and 'close' function. Floating a widget will detach it from the GUI, and allow you to drag it around the screen, or to another monitor. The close function will close the widget, at which point you must re-open it from the View menu or toolbar.
Different widgets function in different ways, and their specific function will be covered in other sections of this documentation.