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[groff] 19/32: doc/ Fix content nit and clarify.

From: G. Branden Robinson
Subject: [groff] 19/32: doc/ Fix content nit and clarify.
Date: Thu, 6 Oct 2022 09:11:23 -0400 (EDT)

gbranden pushed a commit to branch master
in repository groff.

commit 79d04a5119d65f866c112ccf1d7b5c79fece6a58
Author: G. Branden Robinson <>
AuthorDate: Wed Oct 5 04:14:16 2022 -0500

    doc/ Fix content nit and clarify.
    Margin register values do not depend on the selected font (family).  In
    fact they don't depend on anything.  They're always vees reckoned
    against a vertical spacing of 120% of a 10 point type size.  You can't
    override this with command-line register settings.  You can only change
    them after the package initializes.
    Clarify that vertical spacing is reset by paragraph macros (e.g., `lp`
    -> `@p` -> `sz`); introduce that concept and the new `tv` register much
    earlier accordingly.
 doc/ | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/doc/ b/doc/
index 6a1baae9e..6cd9f6ac5 100644
--- a/doc/
+++ b/doc/
@@ -243,7 +243,13 @@ the type size
 .NR (pp
-and vertical space of
+and vertical spacing
+(text baseline distance)
+.NR (tv
+of the type size.
+Vertical space of
 .NR (ps
 is inserted
@@ -572,10 +578,9 @@ or more than eight spaces total.
 The spacing
 of headers and footers
-is controlled by four registers,
-computing distances based on the output device's default font,
-type size,
-and vertical spacing.
+is controlled by four registers
+initialized to values scaled
+with respect to the default type size and vertical spacing.
 .NR (hm
 is the distance from the top of the page
@@ -696,19 +701,13 @@ by an extra
 [same as
 .NR (ps ]
 of vertical space
-and use a
-vertical spacing
-(distance between text baselines)
-as a percentage of the type size
+and use a vertical spacing of
 .NR (dv
 Long quotation pre- and post-space is stored in a dedicated register,
 while centered blocks have none;
-both use the vertical spacing register for
-normal text,
-.NR (tv
+both use the vertical spacing of normal text,
+.NR (tv .
 .b .(l
 .i A

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