Click on a station and look near the bottom of the page. Click on the button that says "Set mission spawn area. You can set the radius from 5km to 150km. You can also move the center of the radius by clicking and hold to drag blue cursor to the location you want the center to be. Each station has it's own radius that can be set.
Why do you feel the need to respond to most everything rather you know what your talking about or not?
Thanks.. I'm totally blind!