4 Text, math, and the export directive.
In general, both HTML and RTF are inferior to TEX in terms of typesetting flexibility. For example, neither one will render mathematical formulas correctly. For this reason, the TeXpider divides the output into two piles:
Output that will be formatted by the target language (HTML, e.g.) is saved into the target language files (.htm)
Output that cannot be well-formatted by the target language is saved into pre-built graphics files (.gif for HTML).
The default assigment is as follows:
Normal text, including headers, accents, footnotes, and tables is given to the target language.
Math is converted into graphics files.