GNU Info

(web2c.info)Three programs

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Enter node , (file) or (file)node

Three programs: Metafont, MetaPost, and TeX
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  TeX, Metafont, and MetaPost have a number of features in common.
Besides the ones here, the common command-line options are described in
the previous section.  The configuration file options that let you
control some array sizes and other features are described in Note:
Runtime options.

Initial and virgin

Making memory dumps vs. production runs.

Memory dumps

fmt/.base/.mem files for fast startup.

Editor invocation

The `e' response at errors.

\input filenames

~ and $ expansion in TeX/MF/MP.