One foot to press them
one foot to guide them
one foot to roll them
and in a tidy hem bind them.

(That's a 24 meter strip of cotton voile, or 48 meters of rolled hem sewed with small stitches (length setting <2 on the machine) that took more than one hour with a hemming foot, I don't want to think how long that would have taken without. Next step: the ruffler)