Holaplex supports the creation and sale of prints of NFTs-- digital copies of the master edition. There are two ways to create and sell prints. One, open editions, and two, limited editions (which can be read about here).
Limited edition sales allow you to create a fixed number of prints of your master edition NFT and auction them off. You retain ownership of the master edition NFT.
To sell limited edition prints on Holaplex, select Limited Edition as your auction type. This will let you choose how many prints to make of your NFT on the next page, in addition to the NFT that you want to make prints of. Each print will be given a unique number (ex: 1 of 30). Other than that, you should be able to follow the steps outlined here to sell your limited edition prints.