.\" $OpenBSD: undef.in,v 1.1 2018/04/09 22:26:25 schwarze Exp $ .TH NR-INCR 1 "April 10, 2018" .SH NAME nr-incr \- increment a number register by accessing it .SH DESCRIPTION .nr myr 0 1 Roff can count by merely accessing a number register: \n+[myr] \n+[myr] \n+[myr] .PP .nr myr +0 1+1 It can also change the step size: \n+[myr] \n+[myr] \n+[myr] .PP .nr myr +0 3 It can also count down: \n-[myr] \n-[myr] \n-[myr] \n-[myr] .PP .nr myr -0 -2 Down in negative steps is up: \n-[myr] \n-[myr] \n-[myr] \n-[myr]