NX-600 FAQs & Troubleshooting NX-600 Not your product? Sort by Updated Date Popularity 1 Results 1. 06/11/2007 I cannot select the pattern, when I press Buttonhole stitch key or Appliqué stitch key in the operation panel, It only changes the decreasing or increasing of tension on the upper thread. More FAQs (English only) Sewing (Utility Stitches) FAQs & Troubleshooting