There is a function for this on your account on the marketplace! In “My NFTs” there you’ll find a button “Transfer NFT”, where you can choose an NFT, enter the public address of another wallet and start the transfer. This way you can send an NFT out to another wallet of yours or also gift a friend with an NFT you own.
Please note: the receiver must be a Polygon wallet! If you’re using wallets like MetaMask, you can simply set them to the MaticMainnet and use the public address you get after you’ve set it up. Please make sure to not have any typos in the address, since this would lead in losing your NFT forever somewhere in the blockchain.