How to use Bessel tool for CDR matting

Bessel is a drawing tool in CDR, which is similar to a pen in essence. But the "cutout" in CDR is like this. After you outline with Bezier curve or pen drawing, put the picture you want to cut into the container, then edit the contents of the container, match the picture with the path you cut, and then end the editing, so it is the cutting of CDR. One thing to note is that when you draw the path, you must ensure that it is closed, otherwise you can't put the picture in it!