Open your document in Google Docs.
Click **File**.
Click **Page setup**.
Under **Margins**, enter values for **Top**, **Bottom**, **Left**, and **Right**.
Click **OK**.
To change margins using the ruler:
Make sure the **ruler** is visible (click **View** → **Show ruler**).
Drag the margin markers on the ruler to adjust **Left** and **Right** margins.
Use the **indents** markers to adjust paragraph indentation separately from page margins.