Set page number requirements at the bottom of the footer
1. The first page (first page) has no page number
2. The page number of the second page is 1
3. Starting from the second page, the page number starts to increase by +1
Setting method
1) Menu bar: Insert - page number - bottom of the page
2) Menu bar: Page Number——Set Page Number Format
3) In Page Number Format, select the starting page number and set it to 0
