Exporting Google Sheet as PDF with Custom Headers or Footers in Google Apps Script
I'm wondering how to add custom headers or footers to a PDF that is exported using Google Apps Script from a Google Sheet. I would like to add a footer that says "My Company Proprietary and Confidential" in the center of the page. This is functionality that is available in normal PDF export from Sheets (i.e. File » Download as » PDF » Headers & footers » EDIT CUSTOM FIELDS), but I don't know how to replicate it with URL parameters. I've also tried setting '&sheetnames=true&printtitle=true' , but this puts the sheet name and spreadsheet name in the header instead of the footer. Are there any