An extension and retraction arrangement with a sliding door construction for adjusting a monitor from a retracted configuration to an extended configuration. The door is slidable between an open position and a closed position for at least partially closing the aperture in the framework. A pocket door is pivotally coupled to an arm aperture portion in the door, and a flipper door is pivotally coupled to an arm aperture portion in a framework. The flipper door and the pocket door interlock to be retained in closed positions to seal the arm aperture when the extension and retraction arrangement is in a storage configuration. The door is articulated with multiple sections and is guided by drive pins engaged with drive slots and slide pins that slide along guide surfaces of drive path subassemblies.