1, open your paper document.

2. Use the mouse to select all the contents in the paper document.

3. Check whether your text has blocky background color, gradient color, color shading, etc.

4. If you find that the background color is not white, you can remove the background color or change it to white.

5. In Word, you can change the background color of the page by selecting the Page Color drop-down menu on the Design tab and selecting the White option.

6. If you use other text editing software, you can check the software help documents or search online tutorials for more details.