Left Reference (X Scale)

Left Reference sets the value for the first point displayed. This setting is effective only when the Full Scale check box is cleared.

When the mouse wheel or the keyboard arrow keys are used to change the value of Left Reference, the Right Reference also changes to maintain the scale. The arrow keys and the mouse wheel step the value by 1/10 the scale.

When a new value is entered for Left Reference, the value for Right Reference does not change but the scale changes.