The first step is to insert the page number. There is a page number option under the Insert menu. There are four options in the Page Number dialog box. The second option is "alignment", which means "right side". Change to center. Then select the fourth Format in the dialog box. The first option is the number format. Just select the format you want to use. Sure, sure.

Step 2, change its font size: double-click the page number with the mouse, and it will enter the editable state. Just select it and change the font to five. This must be right. I work in a fast printing shop, and many graduated college students, even doctors and masters, come to do papers. Many can't do this. I hope this helps you. After talking nonsense for a long time, I don't know if you are using word software.