[Pharo-users] Zoom x-axis in RTGrapher?

Hi Everyone, I'm using RTGrapher to display a simple line graph where the x-axis has values from roughly 0 to 500,000 and the y-axis from 0 to 20. What I'd like to be able to do is to zoom in just the x-axis, i.e. instead of displaying the entire 0 to 500,000 range, be able to narrow it down in stages, to, e.g. 430,000 to 431,000. The y-axis would be unchanged, i.e. still 0 to 20. Ideally I could then scroll left and right along the x-axis. I can create a Spec widget with buttons to redraw the graph, but was wondering if there was a better way. Thanks, Alistair