Plain TeX is Knuth's original default format for TeX documents.

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3
votes
1answer
865 views

Horizontal braces with XeTeX take too much space

After some experiments and tests, I managed to create the following code for \upbracefill and \downbracefill in Plain XeTeX, which it seems is that used for \underbrace and \overbrace: ...
6
votes
2answers
1k views

Create my own mapping for XeTeX fonts

I'm trying to create mapping files, to make use of Cambria Math italic calligraphic and double stroke letters in Plain XeTeX. However, I'm unable to do so. This is what I tried to create for the ...
21
votes
1answer
695 views

Why do the definitions of \quad, etc. have \relax in them?

Plain Tex defines \quad so: \def\quad{\hskip1em\relax} Why is the \relax there? It's usually used as a token that can't be expanded, serving as a "do nothing" operation after macro expansion is ...
4
votes
2answers
341 views

How do I create a pdf file from old tex code?

How can I convert the old tex file below into a pdf? I would very much like to know as I have a few other files that I would like to convert. Thanks. PS: I selected the shortest example I had to ...