Printing - customize headers possible?

Is it possible to customize the headers for the printout
(font, font size and header fields)?

Many thanks for your help

No option i’ve seen built-in to modify the header before printing or when printing.

Suggest to put that idea on the Sleekplan “Share and vote for eM Client ideas page”

Is it possible to customize the headers for the printout
(font, font size and header fields)?

Someone has put a suggestion already to modify the Header Font size.