Why can’t I scroll through m?ore than three aircraft at a time?

XRX was designed to show up to three targets at a time, with the top priority, or primary aircraft, displayed on the left side of the screen. Additional aircraft are tracked, but are not as much of a potential threat than the three aircraft displayed. The primary aircraft represents the greatest threat to you. If this information was replaced, even temporarily, by a lesser threat, the greater threat may be overlooked. This would put the pilot at risk. XRX smartly manages traffic prioritizing so that the pilot doesn’t have to.