gbranden pushed a commit to branch master
in repository groff.
commit 262986193d7a12d34f70bd3d1dffd8f601b606b4
Author: G. Branden Robinson <[email protected]>
AuthorDate: Fri Jul 4 17:56:43 2025 -0500
doc/*,man/*: Revise "Measurements" discussion.
1n equals 1m on terminal devices.
---
doc/groff.texi.in | 9 +++++++--
man/groff.7.man | 4 +++-
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/doc/groff.texi.in b/doc/groff.texi.in
index 058354822..65956c700 100644
--- a/doc/groff.texi.in
+++ b/doc/groff.texi.in
@@ -6302,7 +6302,9 @@ that need to scale with the typeface or vertical spacing.
@cindex @code{m} scaling unit
@cindex unit, scaling, @code{m}
@cindex scaling unit @code{m}
-Em; an em is equal to the current type size in points. It is named thus
+Em;
+an em is equal to the current type size in points.
+It is named thus
because it is approximately the width of the letter@tie{}@samp{M}.
@item n
@@ -6310,7 +6312,10 @@ because it is approximately the width of the
letter@tie{}@samp{M}.
@cindex @code{n} scaling unit
@cindex unit, scaling, @code{n}
@cindex scaling unit @code{n}
-En; an en is one-half em.
+En;
+on typesetters,
+an en is one-half em,
+but on terminals an en equals an em.
@item v
@cindex vertical space unit (@code{v})
diff --git a/man/groff.7.man b/man/groff.7.man
index d8159ecee..d58b6a24c 100644
--- a/man/groff.7.man
+++ b/man/groff.7.man
@@ -937,7 +937,9 @@ an em is equal to the current type size in points.
.TP
.B n
En;
-an en is one-half em.
+on typesetters,
+an en is one-half em,
+but on terminals an en equals an em.
.
.TP
.B v
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