This is done in turn: If you want to insert the page number "1" from the third page, then put the cursor on the "Next Page" under the "Page Layout" drop-down menu-the last point of the document on the second page. This is divided into two parts. Then move the cursor to the third page. Click Insert-Page Number-Page Bottom-Select Any Item to confirm that the page number has been inserted.
But sometimes the page numbers may still be numbered from the first page. Actually, we want the third page to start with "1". At this time, you should first select the page number of the third page and uncheck "Link to the previous page header" under the "Design" menu. Select and point to "Format Page Number" under the page number right-click menu-select "Start Page Number" and fill in "1" manually (as many pages as needed)-OK.
Of course, the page numbers of the first two pages can be deleted if they are not needed, which will not affect the page numbers after the third page, because they are separated.