Apply the Turned Sewing Line Type setting to achieve a folded, two-ply look.
Main Menu → Sewing → Edit Sewing (B) → Property Editor (Click Sewing) → Sewing Line Type
- 2D Toolbar → (Edit Sewing) Tool → Property Editor (Click Sewing) → Sewing Line Type
- Find and click the menu indicated in Location.
- In the Property Editor, change the Sewing Line Type to Turned.
→ The patterns will be sewn together as turned edges.