1) Click Insert-Page Number and select the center position of the footer;

2) Slide the mouse to the position of page number "2", click to modify the page number, and click to start numbering again, and set it to "1", which is applicable to this page and above;

3) Return to the home page, click Delete Page Number to delete the original "1";

In this way, the first page of the whole document has no page number, and "1.2.3.4 ..." appears on the second page.