How do you create a supply of milk?

Chrislip

Hello! New mom here. I am trying to figure out how to create a supply of milk while breastfeeding. Since our milk supply is dependent on the demand, and feeding a new born is every 2-3 hours, how/when do you pump as not to deplete the supply for your baby but increase milk production to create a supply of milk that can be bottled fed? Any suggestions? How did others accomplish this?