groff: Miscellaneous man macros
4.1.4 Miscellaneous macros
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The default indentation is 7.2n in troff mode and 7n in nroff mode
except for 'grohtml', which ignores indentation.
-- Macro: .DT
Set tabs every 0.5 inches. Since this macro is always executed
during a call to the 'TH' macro, it makes sense to call it only if
the tab positions have been changed.
-- Macro: .PD [nnn]
Adjust the empty space before a new paragraph (or section). The
optional argument gives the amount of space (default unit is 'v');
without parameter, the value is reset to its default value (1 line
in nroff mode, 0.4v otherwise).
This affects the macros 'SH', 'SS', 'TP', 'LP' (as well as 'PP' and
'P'), 'IP', and 'HP'.
The following two macros are included for BSD compatibility.
-- Macro: .AT [system [release]]
Alter the footer for use with AT&T manpages. This command exists
only for compatibility; don't use it. The first argument SYSTEM
can be:
'3'
7th Edition (the default)
'4'
System III
'5'
System V
An optional second argument RELEASE to 'AT' specifies the release
number (such as "System V Release 3").
-- Macro: .UC [version]
Alters the footer for use with BSD manpages. This command exists
only for compatibility; don't use it. The argument can be:
'3'
3rd Berkeley Distribution (the default)
'4'
4th Berkeley Distribution
'5'
4.2 Berkeley Distribution
'6'
4.3 Berkeley Distribution
'7'
4.4 Berkeley Distribution