Info Catalog
groff: Requests
groff: Embedded Commands
groff: Escapes
5.5.2 Macros
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'gtroff' has a "macro" facility for defining a series of lines that can
be invoked by name. They are called in the same manner as requests -
arguments also may be passed basically in the same manner.
⇒Writing Macros, and ⇒Request and Macro Arguments.