groff_diff(7) says scalesize is 1 by default and gives this rule for interpreting scalesize:
[given] arguments that represent a type size in points the formatter multiplies by scalesize and converts to an integer Surprise: in a font description file "scalesize" is called "sizescale". I ran this experiment in groff 1.23.0: $ grep sizescale devlj4/DESC sizescale 4 $ groff -Tlj4 .nr x 1p .tm \nx 16 $ grep sizescale devascii/DESC <no sizescale found> $ groff -Tascii .nr x 1p .tm \nx 3 More surprises: I can't square either answer with groff_diff. Doug
