How to remove the header from the PDF

Hello, I am trying that the header is not displayed in the PDF, because it takes up a lot of white space at the beginning of the document, but it keeps appearing, I have set the size values to 0, and the margins to 0, but it still leaves me the blank space at the beginning of the document, how can I remove this part or tell it not to come out?

• This topic was modified 4 years, 2 months ago by raptor_00.