gbranden pushed a commit to branch master
in repository groff.
commit a7e90307a339ede117c15d680727dc472cbea4d8
Author: G. Branden Robinson <g.branden.robin...@gmail.com>
AuthorDate: Sat Jul 12 09:34:26 2025 -0500
doc/*,man/*: Parallelize type size discussions.
---
doc/groff.texi.in | 73 ++++++++++++++++++++++++++++++++++++++--------------
man/groff_diff.7.man | 37 ++++++++++++++------------
2 files changed, 74 insertions(+), 36 deletions(-)
diff --git a/doc/groff.texi.in b/doc/groff.texi.in
index 343bc4c25..d9225bc17 100644
--- a/doc/groff.texi.in
+++ b/doc/groff.texi.in
@@ -13055,14 +13055,28 @@ scaling units.
@result{} E: .s=10.5z, .ps=10500s
@endExample
-It makes no sense to use the @samp{z} scaling unit in a numeric
-expression whose default scaling unit is neither @samp{u} nor @samp{z},
-so GNU @code{troff} disallows this. Similarly, it is nonsensical to use
-scaling units other than @samp{p}, @samp{s}, @samp{z}, or @samp{u} in a
-numeric expression whose default scaling unit is@tie{}@samp{z}, and so
-GNU @code{troff} disallows those as well.
-@c END Keep (roughly) parallel with subsection "Fractional type sizes
-@c and new scaling units" of groff_diff(7).
+It makes no sense to use the
+@samp{z}@tie{}scaling
+unit in a numeric expression whose default scaling unit is neither
+@samp{u}
+nor
+@samp{z},
+so GNU
+@command{troff} @c GNU
+disallows this.
+Similarly,
+it is nonsensical to use scaling units other than
+@samp{p},
+@samp{s},
+@samp{z},
+or
+@samp{u}
+in a
+numeric expression whose default scaling unit
+is@tie{}@samp{z},
+and so GNU
+@command{troff}
+disallows those as well.
@DefregList {.psr}
@DefregListEndx {.sr}
@@ -13072,19 +13086,40 @@ GNU @code{troff} disallows those as well.
@cindex point size registers, last-requested (@code{.psr}, @code{.sr})
@cindex @code{.ps} register, compared to @code{.psr}
@cindex @code{.s} register, compared to @code{.sr}
-Output devices may be limited in the type sizes they can employ. The
-@code{.s} and @code{.ps} registers represent the type size selected by
-the formatter as it understands a device's capability. The last
-@emph{requested} type size is interpolated in scaled points by the
-read-only register @code{.psr} and in points as a decimal fraction by
-the read-only string-valued register @code{.sr}. Both are associated
-with the environment (@pxref{Environments}).
+Output devices may be limited in the type sizes they can employ.
+The
+@code{.s}
+and
+@code{.ps}
+registers represent the type size selected by the formatter
+as it understands a device's capability.
+The last
+@emph{requested}
+type size is interpolated in scaled points
+by the read-only register
+@code{.psr}
+and in points as a decimal fraction
+by the read-only string-valued register
+@code{.sr}.
+Both are associated with the environment (@pxref{Environments}).
-For example, if a type size of 10.95 points is requested, and the
-nearest size permitted by a @code{sizes} request (or by the @code{sizes}
-or @code{sizescale} directives in the device's @file{DESC} file) is 11
-points, the output driver uses the latter value.
+For example,
+if a type size of 10.95@tie{}points is requested,
+and the nearest size permitted by a
+@code{sizes}
+request
+(or by the
+@code{sizes}
+or
+@code{sizescale}
+directives in the device's
+@file{DESC}
+file)
+is 11@tie{}points,
+the output driver uses the latter value.
@endDefreg
+@c END Keep (roughly) parallel with subsection "Fractional type sizes
+@c and new scaling units" of groff_diff(7).
@cindex changing type sizes (@code{ps}, @code{\s})
@cindex type sizes, changing (@code{ps}, @code{\s})
diff --git a/man/groff_diff.7.man b/man/groff_diff.7.man
index eda73dc65..6aa74fd4d 100644
--- a/man/groff_diff.7.man
+++ b/man/groff_diff.7.man
@@ -490,6 +490,26 @@ disallows those as well.
.P
Output devices may be limited in the type sizes they can employ.
.
+The
+.B .s
+and
+.B .ps
+registers represent the type size selected by the formatter
+as it understands a device's capability.
+.
+The last
+.I requested
+type size is interpolated in scaled points
+by the read-only register
+.B .psr
+and in points as a decimal fraction by the read-only string-valued
+register
+.BR .sr .
+.
+Both are associated with the environment.
+.
+.
+.P
For example,
if a type size of 10.95\~points is requested,
and the nearest size permitted by a
@@ -504,23 +524,6 @@ directives in the device's
file)
is 11\~points,
the output driver uses the latter value.
-.
-The
-.B .s
-and
-.B .ps
-registers represent the type size selected by the formatter as it
-understands a device's capability.
-.
-The last
-.I requested
-type size is interpolated in scaled points by the read-only register
-.B .psr
-and in points as a decimal fraction by the read-only string-valued
-register
-.BR .sr .
-.
-Both are associated with the environment.
.\" END Keep (roughly) parallel with groff.texi node "Using Fractional
.\" Type Sizes".
.
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