mag - Man Page

computes TeX fontsizes and magsteps


mag [-Rdpi] magstep . . .

mag [-r] [-Rdpi] fontsize . . .


This tool calculates fontsizes given magsteps.  TeXfonts are provided as true sized fonts or as magnifications.  The fontsize of a true sized font equals the resolution of the printer (ex.  300).  The fontsize of a font magnified n magsteps equals: 1.2n×300rounded to its nearest integer value.  Fontnames for TeX fonts normally consists of the name (cmr), pointsize (10), type (pk) and fontsize (360), for example: cmr10.360pk.


The result of mag -R240 -2 0 0.5 1 will be:

167 240 263 288

The inverse function is computed with the -r option. The result of mag -r -R240 167 240 263 288 will be the fontsteps:

-2 0 0.5 1

The UNIX shells allow command substitution. One can write:

mag -r -R240 `mag -R240 -2 0 0.5 1`


18 December, 1989


Piet Tutelaers
University of Technology Eindhoven
Maintained in TeX Live; please send bug reports or other correspondence
to (


1 Feb 2016