er the flexibility that a cabinet- or wall-mounted camera cannot provide. Camera Control A basic requirement of video communication systems is camera control. Two important camera control features are far-end camera control, and camera presets. Far- end camera control allows a person on one end of a videoconference to control a camera on the other end. It is useful when the participants on the other end are untrained in system operation or when they forget to move their camera to follow the action. Near-end participants can step in to help, and thus assume responsibility for cameras on both ends. Multipoint far-end camera control is generally not offered because controlling cameras in more than two sites can become confusing. The camera-equivalent of telephone speed-dial, camera presets help speed camera movement. At the beginning of a meeting, a system operator frames key participants in the camera, makes any adjustments to zoom or centering that may be necessary, and then enters the position into memory. To recall the setting, the operator presses a button or touches an electronic pad to move the camera to its preset position. When group discussion gets lively, presets allow an operator to capture most or all the action for the distant end. Most systems allow presets to be arranged for more than one camera (main and auxiliary, for instance). Some go farther to allow both near-end and far-end camera presets. The number of camera presets also varies Video Communications: The Whole Picture between systems. While more presets can allow for more options, it can also make the system more confusing. Many group-oriented video communication systems offer follow me camera features. In these systems, a software-controlled camera is synchronized with room or speaker microphones. Speech causes the camera to follow the action. Graphics Support And Subsystems Documents and graphics are exchanged in most in-person meetings. Video communication systems should provide some form of support for document transfer. At a basic level,