Page Setup Paper Options In Word 2016. On the Layout tab in the Page Setup group click Size. Click File Menu and select Page Setup command.
Click File drop down menu. On the Design tab in the Page Setup group click the Page Setup Dialog Box Launcher. Choose Page Setup in the drop down menu.
Choose Proofing in the left pane.
Choose Page Setup in the drop down menu. Just select an option from this list to change the paper size of the entire document. On the Layout tab in the Page Setup group click Size. Click to know more information and free download Classic Menu for Office.