by Trent A. Fisher and Werner Lemberg - The GNU Operating System

34 The GNU Troff Manual
\n[VS]
[Register]
Defines the space between lines (line height plus leading). If the value is
larger than or equal to 1000, divide it by 1000 to get a fractional point
size. Due to backwards compatibility, VS must be smaller than 40000
(this is 40.0 p).
Effective: next paragraph.
Default: 12 p.
\n[PSINCR]
[Register]
Defines an increment in point size, which is applied to section headings at
nesting levels below the value specified in GROWPS. The value of PSINCR
should be specified in points, with the p scaling factor, and may include
a fractional component; for example, ‘.nr PSINCR 1.5p’ sets a point size
increment of 1.5 p.
Effective: next section heading.
Default: 1 p.
\n[GROWPS]
[Register]
Defines the heading level below which the point size increment set by
PSINCR becomes effective. Section headings at and above the level specified
by GROWPS are printed at the point size set by PS; for each level
below the value of GROWPS, the point size is increased in steps equal to
the value of PSINCR. Setting GROWPS to any value less than 2 disables the
incremental heading size feature.
Effective: next section heading.
Default: 0.
\n[HY]
[Register]
Defines the hyphenation level. HY sets safely the value of the low-level hy
register. Setting the value of HY to 0 is equivalent to using the nh request.
Effective: next paragraph.
Default: 14.
\n[FAM]
Defines the font family used to typeset the document.
Effective: next paragraph.
Default: as defined in the output device.
Paragraph Settings
\n[PI]
Defines the initial indentation of a (PP macro) paragraph.
Effective: next paragraph.
Default: 5 n.
[Register]
[Register]