Section 26.5 Processing Parameters
Some of the options for different conversions are accomplished by string parameters. You can set these in the project manifest using, for example, <stringparam key="latex.font.size" value="14pt">. This will use a larger overall font size, while trying to preserve the same number of characters per line (with consequent smaller margins).
Notice that this example does nothing to change the words that a conversion produces, which is why you do not specify them in your source, and why they are documented here in the Publisher's Guide (Part IV) They are conversion options that do not affect your content in significant ways, and are related to the particular output format. Note that we are phasing out these parameters in favor of the Publisher's File (see Section 26.1).