Use this option to display an additional header line on the Space or the Total view, showing the total tracks of all data sets, the total tracks of all non-excluded data sets, the number of data sets listed, and the number of non-excluded data sets listed.

Depending on the size of the data set list, processing time increases because the tracks information for all data sets has to be collected before the list is displayed. When the list comprises 50 data sets or more, a pop-up panel is displayed, indicating the progress of the data collection. The keyboard locks when this pop-up panel appears and stays locked until the data set list is displayed.