Here is a posting I found out on the L posted by Terry Lehman
However on Datamax thermal labels this has always been a problem as any increase in size automatically switched the 'tallMANN' to 'TALLMAN'.
Also I found the Datamax printers only responded to SIZE increases of 0.5 and did not respond to FONT=b
To my surprise this has changed. I am working with a new C/S 5.55 and new Datamax M Class Mark II printers
They now respond to FONT=B and to SIZE increases of 0.1 increments.
PLUS they now print any size/font in 'tallMAN'.
I don't know what changed at Datamax as Meditech has always told me this problem was beyond their control, but I wanted others who are planning to purchase printers to be aware of this.