unset key
set sample 500
dat="zoom.dat"
set table dat
plot [0:50]  exp(-(x-15)**2) + x**2/500 + (sum [i=1:6] rand(0))/8
unset table

set t pngc enh font "Arial,10" si 480,360
set ou "multi_zoom.png"
set multi lay 1,2
set xlabel "Energy [eV]" font ",14"
set ylabel "Intensity [arb.]" font ",14"
#
set size 1,1
set arrow 1 from 16, 2 to 25,3 head filled size 3,15 \
            lw 1 lc rgb "dark-green"
set object 1 rectangle from 25,1 to 48,9 fill solid 1 noborder \
    fc rgb "white" front
plot [:][0:10] dat w l
#
set grid
unset arrow 1
unset object 1
unset xlabel
unset ylabel 
set ytics 0.5
set size 0.5,0.7
set orig  0.45, 0.22
plot [10:20][0.5:2] dat w l
unset multi