[Groff] Margin notes

[Lars Segerlund]

 I'm trying to get groff and mm to give me some margin notes a.la 
Concrete Mathematics, but I'm not sure on how to do this, since the 
output is desired around the place in the text where it occurs, and it 
infringes on the margin, I was thinking of creating a keep and then 
putting a marker to back up to after outputting the regular text.

 Any ideas ?

 This seem's a bit akward, since I really think I should define the 
margin ( left or right ), in a similar way to two colums or something, 
but I don't have any idea on how to handle a left margin.

 / regards, Lars Segerlund.