set xtics ("18" -6) Can't get this to work (in pdf output 18 not displayed) reset set nodisplay set term pdf set output './TEST.pdf' set xtics ("18" -6, "24" 0, "6" 6, "12" 12, "18" 18) set nox2tics set ytics 0,7,42 set noy2tics set ytics outward set xlabel 'Ortszeit' set ylabel 'Tage' set size ratio 1.2 set arrow 100 from 4.3,42 to 4.3,-2 with nohead lw 2 plot [-6:18][44:-3] set display refresh