There are several methods available in VMD for the user to control and interact with the molecular display. The primary methods are by using the mouse, either in the VMD graphical display window (where the molecule is displayed) or in the different graphical user interface (GUI) forms provided by the program. In addition to the mouse, VMD also supports the use of a number of advanced input devices such as the Spaceball, Magellan, and Phantom, which provide the ability to manipulate molecules with six degrees of freedom. Some devices such as the Phantom can also provide haptic (sense of touch) force feedback. VMD also provides a text console interface, in which the user can enter and execute simple commands or more sophisticated VMD scripts. This chapter describes how to use the mouse-based user interface components and a subset of the more advanced input devices supported in VMD. This chapter describes the basic operation of the graphical user interface components, and gives a quick overview of each available form. The other primary user interface component, the text user interface, is described fully in chapter § .