You can define whether the newly created page has a watermark by default.
Click "Watermark for new pages"edit icon, and the pop-up window is as follows:
...
Display watermark: The newly created page has will display watermark by default;
Hide WatermarksWatermark: The newly created page does will not have display watermark by default;
Same as the parent page: It will follow the parent page. If the parent page has watermark, the newly created page will also have watermark, and vice versa. If there is no parent page, you can define whether to display the watermark.