To edit any item in your gallery just click the thumbnail tile of the desired art piece in the ’Art’ tab on your dashboard. From there you can edit title, tags, and descriptions or delete the item. Be careful though, the delete action cannot be undone.
To hide an item in your gallery simply click ‘deactivate’ beside the item in the top left of the edit art screen. Now it will not show in your gallery and can be found under the 'inactive' tab.