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| Chapter 12 Nroff and Troff |

## .ad

    .ad [c]

Adjust output lines according to format `c`. Fill mode must be on (see .fi). With no argument, return to previous adjustment. 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.

Reference: .ab |  | Reference: .af