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4.1.3 Macros to set fonts

The standard font is roman; the default text size is 10 point. If command line option -rS=n is given, use npt as the default text size.

— Macro: .SM [text]

Set the text on the same line or the text on the next line in a font that is one point size smaller than the default font.

— Macro: .SB [text]

Set the text on the same line or the text on the next line in bold face font, one point size smaller than the default font.

— Macro: .BI text

Set its arguments alternately in bold face and italic, without a space between the arguments. Thus, 

          
          .BI this "word and" that

produces “thisword andthat” with “this” and “that” in bold face, and “word and” in italics.

— Macro: .IB text

Set its arguments alternately in italic and bold face, without a space between the arguments.

— Macro: .RI text

Set its arguments alternately in roman and italic, without a space between the arguments.

— Macro: .IR text

Set its arguments alternately in italic and roman, without a space between the arguments.

— Macro: .BR text

Set its arguments alternately in bold face and roman, without a space between the arguments.

— Macro: .RB text

Set its arguments alternately in roman and bold face, without a space between the arguments.

— Macro: .B [text]

Set text in bold face. If no text is present on the line where the macro is called, then the text of the next line appears in bold face.

— Macro: .I [text]

Set text in italic. If no text is present on the line where the macro is called, then the text of the next line appears in italic.