Fold seam allowance, collars, and cuffs in the 3D Window before Simulation is activated.
Main Menu > 3D Garment > Fold Arrangement
3D Garment Window Toolbar > (Fold Arrangement) Tool
After the patterns have been arranged, find and click the menu indicated in Location.
→ All of the garment's Internal Lines/Shapes will be highlighted.
Click on the Internal Line/Shape you would like to fold.
→ The Folding Gizmo will appear.
Use the red and green arrows, along the blue circle, to rotate the patterns.
→ The patterns will fold and arrange accordingly.