Setting History Depth

By default older lines are discarded from the event list to stay within a specified History depth. To change History depth, click the History toolbar button, choose History Depth on the View menu, or press Ctrl+H.  

This action opens the Event List History Depth dialog box.

Event History Depth Dialog Box

Note

Turning off Auto Scroll temporarily sets the History Depth to an unlimited number of lines so that new items will continue to appear in the display.