Open the Google Docs document
Double-click the header area at the top of the page
Select the header text or content
Press Backspace or Delete
If needed, click Options in the header toolbar
Choose Remove header
Save the document if prompted
Open the Google Docs document
Double-click the header area at the top of the page
Select the header text or content
Press Backspace or Delete
If needed, click Options in the header toolbar
Choose Remove header
Save the document if prompted