@Section
   @Title { An alternative version that uses @TeX's fonts }
   @Tag { teq }
@Begin
@PP
There is an alternative version of the @Code "@Eq" symbol that
tex. @RawIndex { @TeX }
tex.mathfonts @SubIndex { mathematical fonts }
uses fonts taken from the @TeX document formatting
system.  These fonts are said to produce better-looking
mathematics than the Adobe Systems Symbol font used by the
standard @Code "@Eq" symbol.
@PP
The fonts were converted from @TeX form to PostScript form by
Basil K. Malyshev, who has attached a license to them permitting
malyshev @Index { Malyshev, Basil K. }
non-commercial use only.  This is a much more stringent license
than the one attached to Lout itself.  For this reason, the files
needed to use these @TeX fonts are distributed separately from the
rest of Lout, although you can get them from the same place (see the
preface of this guide).
@PP
Once these files are installed, you change from the standard
@Code "@Eq" symbol to the @TeX version by changing the initial
@Code "@SysInclude { eq }" to {@Code "@SysInclude { teq }"}.  Do
absolutely nothing else.
@PP
Unfortunately, the @TeX fonts are not usually resident on PostScript
printing devices, which means that Lout is obliged to include them in
its PostScript output file.  You don't have to do anything to make this
happen, but the cost is fairly large:  changing to
@Code "@SysInclude { teq }" increases the size of the PostScript
output file by 252 kilobytes.
@PP
It is possible to gain access to characters in the @TeX
fonts that are not accessible directly from {@Code "@Eq"}, mainly
script capitals and bold-italic Greek letters.  For example, you can
use @Code "{cmsy Base} @Font @Char \"A\"" to get a script A, and
@Code "{cmmi Bold} @Font @Char \"pi\"" to get a bold-italic
{@Sym pi}.  For the full story, consult file @Code "teq" in the
Lout system include directory for the names of these fonts, and then
look in Lout's font directory for their font metrics files, which
show the names and encodings of all the characters.
@End @Section
