Question: To zip up pants,
Options:
button the waist, grab the bottom of the zipper and hold down with one hand, grab the metal handle of the zipper and pull up until zipped.
button the waist, grab the top of the zipper and hold down with one hand, grab the metal handle of the zipper and pull down until zipped.
Answer: button the waist, grab the bottom of the zipper and hold down with one hand, grab the metal handle of the zipper and pull up until zipped.