First, go to Size. Near the bottom of the dialog box, make sure the Apply To drop-down list is set to Whole Document. Here's how you can add a On the File menu, click Page Setup.
How do I do this? Go to View, and uncheck Header and Footer so that you can leave the Header and Footer area and start editing your text area.
Select the paper-size drop-down to pick the output you prefer. Less In Word for Mac, you can choose a predefined paper size from a list and change the paper size for all pages in your document, for a specific page, or for a specific section.
Double-click in the body of the page to close the footer.
Noticed I started out by saying that this is theory. Let's look at theory first. Set up your Microsoft Word document Next, set up a Word document to insert your letterhead design into.