An instrument screen display includes a unique marker that provides the correlation and navigation through the analog data. The marker tells the user which packet or symbol is being displayed in the analog trace. The selected line in the listing (listing row that is blue) and the blue line on the trace above indicate which packet is selected for the purpose of showing details and packet data in the other tabs in the listing window. In addition to correlation, navigation can occur from either display. This type of marker is an innovative approach to correlating and navigating the disparate data types displayed on a modern oscilloscope.