If you are the owner of a smart contract and your NFTs are already minted, you can easily import your NFTs to Galler. Please make sure your contract follows these standards.
1) Once you’re connected to Galler, hover your mouse over your username/wallet address in the top right corner and click on “My Collections”
2) Click on "Import"
3) Select the network and input your smart contract address
4) Once the collection is imported, fill in your collection info as well as the royalty fee (between 0-10%). You can edit those details at any time by going to "Import Collections", find the collection you want to edit and click on "Edit".
5) Once you submit those details, your collection is imported. You can see your NFTs under "My Assets" and list them for sale!