To Set the Paper Size for a Layout

1. Click the layout tab for which you want to set the paper size.
2. Click File > Page Setup Manager.
3. In the Page Setup Manager, Page Setups area, select the page setup that you want to modify.
4. Click Modify.
5. In the Page Setup dialog box, under Paper Size, select a paper size from the list. Click OK.
6. In the Page Setup Manager, click Close.