
  - Go to Layout or Page Layout >Margins >Custom Margins.
 
  - Enter new values for the margins. 
 

  - Go to Page Layout >Margins. 
 

 
   Select Custom Margins. 

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  - If you’re not already in Edit view, select Edit Document >Edit in Word for the web.
 
  - Go to Page Layout >Margins. 
 
Image of Word Web App Margins dialog box" />
  
Select Custom Margins.
  Set your custom margins. 
Note: If your document contains multiple sections, the new margin type will only be applied to the current section.