The user interface 270 includes a control panel (e.g., buttons, touch screen, or rotatable dial 275) for controlling the operation of one or both of the camera 18 and the display device 266. The user interface 270 may also be used to control the operation of the camera 18. For example, the user interface 270 may enable a user to control lights, take a picture, or start and stop the recording feature of the camera 18. Similarly, the user interface 270 may be used to navigate through software programs on the display device 266. For example, the user may be able to stop or restart the distance counter that tracks the end of the cable 14 as it extends through the pipe, adjust the brightness of the display device 266, or rearrange the items showing on the display device 266. As another example, the user may be able to use the rotatable dial 275 to select a graphical user interface component (e.g., graphical user interface component 2510a in