Beneath that; under that (indicating a location or destination). Used for static location or the endpoint of movement; differs from 'その下で', which often indicates location where an action occurs or a condition.
机の上に本があり、その下に古い手紙が入っていた。
There was a book on the desk, and beneath it an old letter was inside.
写真を壁に貼って、その下に小さな棚を設置した。
She put a photo on the wall and installed a small shelf under it.
地図のその下に注釈が書かれている。
There is a note written below the map.