How to Create a Book in Microsoft Word - How-To Geek Once you're in Word, head over to the "Layout" tab. In the "Page Setup" group, click the small arrow at the bottom-right. This opens the "Page Setup" window, where you will automatically be on the "Margin" tab. In the "Margins" group, you're able to set the margins of the page. By default, the "Gutter" margin will be set to 0.