1 files changed, 3 insertions, 1 deletions
diff --git a/roff.7 b/roff.7
index 5bf16141..5905ce06 100644
--- a/roff.7
+++ b/roff.7
@@ -1477,7 +1477,9 @@ This is a Heirloom extension and currently ignored.
 Justify the next
 .Ar N
 input lines to the right margin without filling.
-Currently ignored.
+.Ar N
+defaults to 1.
+An argument of 0 or less ends right adjustment.
 .It Ic \&rm Ar macroname
 Remove a request, macro or string.
 .It Ic \&rn Ar oldname newname