Pan Button -

The pan button will allow the user to pan, or move, the chart’s display forward or backward along the x-axis (time) or up or down along the y-axis (trend minimum and maximum).  This feature is useful when the user wants to view trend data in the past, or to view a trend line on the chart that exceeds the chart’s current maximum value.  The chart will stay in pan mode until the user changes the mode to one of the other options.