Make text in ZPL label bold or underlined?

Question

Due to a new EU law every food packaging label has to outline possible allergy-causing ingredients by either styling them bold or underlined in the ingredients

Answer 1

You could also try and make the font width grow a little:

^A0N,18,20

"^A" starts the font setting, where "0" is the embedded font, "N" the rotation, "18" the height and "20" the font width. The last one is 10 by default. So you're actually making the font wider, which results in a form of bold...

It may not affect the lines that are printed horizontally, but you will get a sense of bold.

(I know it's an 'old' topic, but I just wanted to share)