How to Change Margins In Google Docs?

To change the margins go to the Page Setup dialog box.
1. Click File and select Page Setup.
2. Now you can change each margin by clicking a box and typing a new measurement.
3. Click OK when you're done.
4. The default margins are set to one inch on each side.
5. The default margins take effect whenever you create a new document. They will not affect existing documents.

Open your document. Navigate to the screen's upper right corner and click on Menu, indicated by the three dots. Select Page Setup > Margins. Choose from default, custom, wide or narrow margin setup options.