How to print the round corner of a book edge?

How to print the round corner of a book edge?

The video shows how to print on the round corners of a book edge by CSJ210BE, normally we print on one side at first, then print on the other side, to cover the round corners;

1: For single color:

2: For Image Designs: Make the design in right size, you can get a continue print around the book edge nicely！