Auto-scaling of y-axis maximum value

Auto-scaling y-axis maximum value is set to zero if the value is less than zero.

If you are plotting more than one curve and the plot type is Time Data, and the time-data window is displayed, then auto-zooming will not work when removing a curve that has larger y-values than the other curves. To activate the auto-zooming, click twice on the  button on the Plot Settings Toolbar.