Illustrator is a vector graphic editor that lets you create shapes and designs. You can use it to create paths, rectangles, circles, and other shapes. To change the shape of a path in Illustrator, you first need to create a new document. Then, select the Path tool from the Tools palette and click on the desired shape. The Path tool will give you a range of options for creating paths. You can choose to create a straight path, an arc path, or a curve path. When you have created your desired path, press OK and then click on the OK button to close the document.