$OpenBSD: incr.in,v 1.1 2018/04/10 00:52:21 schwarze Exp $
nr-incr - increment a number register by accessing it .nr myr 0 1 Roff can count by merely accessing a number register: \n+[myr] \n+[myr] \n+[myr]

.nr myr +0 1+1 It can also change the step size: \n+[myr] \n+[myr] \n+[myr]

.nr myr +0 3 It can also count down: \n-[myr] \n-[myr] \n-[myr] \n-[myr]

.nr myr -0 -2 Down in negative steps is up: \n-[myr] \n-[myr] \n-[myr] \n-[myr]

.nr myr 42 Go to some other value, then continue incrementing with an unchanged (negative) step size: \n+[myr] \n+[myr] \n+[myr]