Machine Seam

Here's how

1 Lay your two pieces of fabric together, right sides facing.

2 Pin in place, with pins facing perpendicular to the fabric's edge.

3 Place the fabric under the foot and lower foot, carefully sew a running stitch about 1.5 cm from the edge. (You can sew straight over a pin, just be careful).

4 As before with the running stitch, go back on yourself at the end to secure.