Feature Request: Fixed scale

[blue3eight]

Hi, Thank you for this tool!

Automatic scaling is often a very good thing, but in many cases it's necessary to have a fixed scale. Is it possible to add a minimum and maximum value to a graph?

Or, at the very least, have a 'Fixed scale' check box for a graph that remembers the min and max value off the scale and keeps them until the box is unchecked?