Setting the lower y-axis limit

The controls shown above are used to set the lower y-axis limit.

If auto-scale lower y-limit  is toggled, the minimum y-value of any of the curves in the plot will be used as minimum value. The edit window  shows the current value. It is possible to type a new value, but remember to validate it by pressing Enter.

The controls  are used for moving the lower limit either up or down.