Verifying the ^CF command


While looking at examples of ZPL commands to print labels, I've seen several examples of the ^CF command that doesn't appear to follow the specification of older or the latest ZPL language revision.  Specifically, I'm seeing ^CF,0,0,0.  Although 3 parameters are defined for ^CF, the leading comma means the font is skipped.  In this case I would expect ^CF,0,0.  Also, the 0's seem to make no sense for the font height or width. Does this format of ^CF mean something special that I'm missing in the documentation?

Thank you,