[groff] 03/21: groff_mm(7): Document `O` register default.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 1cc03166155220090fb55df681628eb03da5e244
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Tue Nov 15 10:05:45 2022 -0600

    groff_mm(7): Document `O` register default.
    
    Also recast to align better with `L` and `W`.
---
 contrib/mm/groff_mm.7.man | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/contrib/mm/groff_mm.7.man b/contrib/mm/groff_mm.7.man
index 505777bf4..6cae4e769 100644
--- a/contrib/mm/groff_mm.7.man
+++ b/contrib/mm/groff_mm.7.man
@@ -4365,9 +4365,19 @@ l l.
 .IP
 Default is\~0.
 .
+.
 .TP
 .B O
-Page offset, only for command-line settings.
+defines the page offset of the document,
+and must be set from the command line.
+.
+A scaling unit should be appended.
+.
+The default
+.RB is\~ \&.75i
+on terminal devices and
+.B \&.963i
+on typesetters.
 .
 .
 .TP