Excel pro 2019 File/print/page setup/sheet/print titles disabled for different files, printers

Unable to select rows to repeat at top for my own workbook and for a new (empty) workbook on two different printers (MFC-L8900CDW and MFC-9460CDN.   Tried File/print/page setup/sheet/print titles .  Excel is pro 2019 on windows 10 pro.  

Sorry, I don't understand tags or l inks in this context.