Use the scroll toolbar buttons to scroll the graph window forward and
back along the time scale by 90%, scroll the window to the current time, and to
scroll the window forward and back along the time scale by 10%.
Scrolls the window backward in time by 90% of the window.
Scrolls the window forward in time by 90% of the window.
Scrolls the window backward in time by 10% of the window.
Scrolls the window forward in time by 10% of the window.
