First, open the Word program. In the early Word program, you can see that the border is very narrow at this time.

Secondly, in the Word program, select "Page Layout" at the top of the main interface and click Open.

Third, then, select "Margin" under the menu and click Open.

4. Then, select the appropriate border size in the window and click Open.

Fifth, you can finally see that the word border is resized, and the problem is solved.