Epson AcuLaser MX20DNF - Manual (Page 8)

2. Select the characters, then select Font from the Format menu.
3. Select the EPSON BarCode Font you want to use, set the font size, then click OK.
Note:
In Windows Vista, XP, 2000, Server 2008, or Server 2003, you cannot use font sizes larger than 96
points when printing bar codes.
Epson Font Guide
Working with Fonts 8