changing line length in nroff

[Marty]

I texi2troff'd some gnu documentation and I want to print it out off a PC.

I want to increase the effective line length to pack more information on a page.

I used a number of variations of the 
.ll +n command 
and nothing seems to have an impact after a 
.PP command.

If I want to increase the line size about 30 characters (3 inches?) I've done things like:
.ll +3i

and it doesn't make a difference.

I'm puzzled (I'm just a casual nroff user).


marty
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