In word for Mac, I cannot change the paper size. If I select "Layout" from the heading and then select "size" the only option available is US Letter by default (there are no, other options listed). I am in Ireland d we use A4 paper size as default. My iMac is set to Ireland, my keyboard is set to UK English. My Canon Printer is set to A4 paper size as default. I have deleted the canon drivers and reinstalled the latest drivers for my Canon printer and rebooted my iMac and everything is still the same. My Microsoft Office 365 applications are updated and using the very latest version of the software and my iMac is completely up to date. I do use Grammarly and some comments have said this could be an issue but I don't see how. Has anyone got any suggestions this is driving me crazy? Thanks for reading any help would be greatly appreciated.