Known nroff Macros:

.TH
First line with name, man section, version, and date.
.B, .I, .R
Sets the rest of the line in bold/italics/normal. (Line will be tokenized.)
.BI, .IB, .RB, .BR, .RI, .IR
Sets the rest of the line in bold/italics/normal, alternating with each token/word. (Line will be tokenized.)
\fB/\f3, \fI/\f2, \f4, \fR/\fP/\f1
Changes output mode to bold/italics/both/normal. (In-text.)
.SH
Section title.
.SS
Subsection title.
.IP
One list item. Begin of a list.
.TP
One description list entry. Begin of a list.
.RS–.RE
Increased list indentation level. Can be used for sub-lists.
.LP/.P/.PP
One blank line. Also end of a list.
.nf–.fi
A block of unformatted text.
.de–..
Macro definition (ignored).
.ds code replacement
String definition.
.UM url–.UE URL link.
.MT address–.ME E-mail link.
.ig–..
Block comment (ignored).

Known nroff Escape Sequences: