To adjust the page size go to Layout -> Size and click on the page size you want to use. Usually the default page size in a standard Word document is A4 but if it is not for whatever reason it should be changed to size A4.
Page Size
To adjust the page size go to Layout -> Size and click on the page size you want to use. Usually the default page size in a standard Word document is A4 but if it is not for whatever reason it should be changed to size A4.