No idea about your requirement exactly.
But I can see the plotting area is loo large. you can clik somewhere on the chart, then press Cntl+Shit.
Use mouse to reduce the area by adjusting the red color line which is appearing when you press Cntl+Shift
** Under Axis Tab, you can do few adjustment to make this more cute by setting up static steps, min starting point, max ending value in Axis.