On the File tab, click Open.
Go to C:\Users\user name\AppData\Roaming\Microsoft\Templates.
Open the Normal template (Normal.dotm).
Make any changes that you want to the fonts, margins, spacing, and other settings. You can use the same commands and features that you use to change a document — but remember that any changes that you make to Normal.dotm will be applied to documents that you create in the future.
When you have finished, click the File tab, and then click Save.