How do I sew a buttonhole on the XH2135-001?

Attach the buttonhole foot 'A', set the pattern selection dial to Buttonhole, and add together the diameter and thickness of the button to set the button guide plate to the correct length. Lower the buttonhole lever and push it back slightly before starting to sew. The machine will sew the bar tacks in a set order, and you should stop the machine when buttonhole stitching is finished. (Page 2)