Aligning Single Pointed Dart Notches
If you look a flat single pointed dart you will notice that each dart line has a notch marked within the fabric edge. These notches will facilitate the dart folding and stitching process by providing an easy guideline to follow at the dart's widest intake.
When folding single pointed darts in the sewing process, the two dart leg notches should overlap and match perfectly. The middle notch should fall directly on the dart's fold, perfectly corresponding to the dart fold line. Aligning the notches first in the dart folding process, will help in the process of perfectly matching the dart's stitch lines (dart legs).
In addition to matching the seam edge notches, the dart vanishing point should be located directly on the folded edge as shown. When the dart point and all corresponding notches are aligned following these standard conventions, the dart lines will naturally fall into place as needed with only a fe minor adjustments needed to perfectly match the overlapping dart lines.