When Autoscroll is turned on, as time passes the position in time of pens moves by the same amount to keep pace; by default, the display is updated every second. The refresh rate of the display can be controlled by using the Display Refresh Rate property.
When Autoscroll is turned off, as time passes the position in time of pens remain fixed.
By default, Autoscroll is on. You can toggle Autoscrolling on or off by using the Toggle Autoscrolling button.
Using the navigation controls, including the Time Span picker, causes Autoscrolling to be turned off
The Autoscroll command is also available from the right-click (context) menu.