There are a few things you can do to round corners in Illustrator. The first is to use the Round Corner tool. This tool is located in the Tools palette, and it allows you to create a rounded corner on any object. The second thing you can do is use the Polygonal Corner tool. This tool is located in the Edit menu, and it allows you to create a polygonal corner on any object. Finally, you can use the Ellipse tool to create an ellipse around any object.
