optional provides simple, flexible, optional compilation of LaTeX documents. Option switches may be given via package options, by the \UseOption command, or interactively via the \AskOption command (help text may be provided, by defining the \ExplainOptions command). The package is not robust, in the way that comment package is, against ill-behaved text. In particular, verbatim text may not be directly included in optional sections (whether they're included or not).