To view old output use the scroll bar at the right of the window or use these keys:
Up Arrow Scroll back one line Down Arrow Scroll forward one line Page Up Scroll back one page Page Down Scroll forward one page Home Scroll to oldest page End Scroll to most recent page
While you're scrolled, no new incoming data will be visible.
While you are scrolled the Packet Window status bar will display a "Scrolled" status. Clicking on this "Scrolled" status is the same as using the "End" key.