Use this tab window to view a presentation of the history log information for a selected project, subproject, or activity; this history log information is in graphic format. The graph shows the committed, scheduled work, earned value and actual values of the cost or number of hours. The graph is plotted according to the values in the history logs for the activities. You could view the project history for any of the plotted points by clicking on them. You can scroll the time axis by the scroll buttons. The left button scrolls time backward and the right button scrolls time forward.