Gathering

Where a dart hides fullness at a single point, gathering spreads it evenly along a whole edge — think the top of a dirndl skirt, a puffed sleeve cap, or a ruffle. You sew one or two long rows of the longest straight stitch your machine has, leave the thread tails loose, then pull on the bobbin threads to scrunch the fabric up until it matches the length of whatever it's being sewn to.

The trick nobody tells beginners: sew your gathering rows inside the seam allowance, not on the seamline itself, so the stitches don't show and don't get caught when you sew the actual seam. Two rows, about a 1/4" apart, both inside the allowance, gives you much more even control than one row alone — pull both threads together and the fullness distributes itself far more predictably.

I gather by hand-adjusting the fabric along the pulled threads in small sections rather than trying to slide the whole length at once — it's slower but the results are visibly more even, especially on anything drapey.

How I do it:

1. Set the machine to its longest stitch length and loosen the top tension slightly.
2. Sew two parallel rows within the seam allowance, leaving long thread tails at both ends.
3. Anchor one end (wrap the threads around a pin in a figure eight), then gently pull the bobbin threads from the other end, sliding fabric along in small sections until it matches the target length.
4. Distribute fullness evenly, pin generously, and stitch the seam between the two gathering rows.