Clipping the seam allowance

Cut into the seam allowance, sothat the seam will lie flat.
!Don’t cut through the stitching! 

The smaller the curve, the closer the cuts. For outward curves (convex) make little snips in the seam allowance up to the stitching.

For inward curves (concave) cut little wedges in the seam allowance.

For corners cut off the corner of the seam allowance.
Snip into the seam allowance