how to smooth lines

After power tracing an image, the lines are rough, whats the best way to smooth the line?? 

  • Use the Shape tool and edit the nodes.
    •  If you used power tracing, smoothing is a delicate process; however, you can use the smoothing tool from the property bar (When Shape Tool is selected) - but, at your own peril. And 50 is usually too high. I usually set it to 20 or else the shape distorts.