Vertical positions in traps are always multiples of \n[.V].

1 files changed, 5 insertions, 4 deletions

diff --git a/doc/groff.texinfo b/doc/groff.texinfo
index d1f7ee79..5a61cd36 100644
--- a/doc/groff.texinfo
+++ b/doc/groff.texinfo
@@ -11830,10 +11830,11 @@ Note that a page can't be ejected if @code{vpt} is set to zero.
 @endDefreq
 
 @Defreq {wh, dist [@Var{macro}]}
-Set a page location trap.  Non-negative values for @var{dist} set
-the trap relative to the top of the page; negative values set
-the trap relative to the bottom of the page.  Default scaling
-indicator is @samp{v}.
+Set a page location trap.  Non-negative values for @var{dist} set the
+trap relative to the top of the page; negative values set the trap
+relative to the bottom of the page.  Default scaling indicator is
+@samp{v}; values of @var{dist} are always rounded to be multiples of the
+vertical resolution (as given in register @code{.V}).
 
 @var{macro} is the name of the macro to execute when the
 trap is sprung.  If @var{macro} is missing, remove the first trap