1, which is realized by deleting the watermark: select Delete Watermark in the Design tab and the Watermark drop-down menu;

2. By removing the page background: select "No Color" in the Design tab and the Page Color drop-down menu;

3. It is realized by editing the header and footer: inserting some watermarks in the header and footer. You can double-click the header/footer area, drag the mouse to select the watermark and delete it.