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Page explaining the collection and functionalities.
By hitting the 'Account' button on the top right on SIGN Art you'll be brought to your account settings, in here you'll be able to go to 'Owned'
Make sure to toggle to 'Not for sale' when trying to list NFT's for sale.
Besides listing NFT's for sale, updating pricing and canceling sales, you'll also be able to transfer the NFT to another Waves address in your collection, as well as burning an NFT (this will delete the NFT).
Transfer NFT button (to another Waves address)
Burn NFT button
Other functionalities are the ability to download the artwork and license, having a look at the online certificate, as well as the Waves Explorer link of the NFT. There's also a search icon to find more NFT's created by the same artist.