.ad

.ad [c ]

Adjust output lines according to format c . Fill mode must be on (see .fi ). With no argument, same as .ad 1 . The current adjustment mode is stored in register .j , with the following values: 0=l , 1=b , 3=c , 5=r (see .na ).

Values for c

b	Lines are justified.
n	Lines are justified.
c	Lines are centered.
l	Lines are flush left.
r	Lines are flush right.