"I want to change the stitch length for my appliqué placement lines."
In an appliqué piece, the stitch length in the appliqué placement lines is initially set to 2.0 mm. To change the stitch length for the placement lines, select the appliqué piece, then in the Edit tab click Break Apart. The appliqué piece is broken up into its constituent stitch lines, fabric and Stop commands. Adjust the placement lines as desired.