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diff --git a/doc/user/equ_tequ b/doc/user/equ_tequ new file mode 100644 index 0000000..bbb1d20 --- /dev/null +++ b/doc/user/equ_tequ @@ -0,0 +1,41 @@ +@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.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 +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 |