So I should change the width to 50 mil and then click on each power and gnd trace? Is there a quick way to change them all at one time?
It depends on your particular CAD program. I never use auto-routing myself, so I cannot tell
you. Auto-routing always creates zillions of vias, like it did on your board. You can make the
layout cleaner and reduce the #of vias by moving and rotating the components, but that takes
practice in visualization, which comes more from manual routing than using auto-routing all
the time. It's clearly a multi-dimensional visualization problem.