# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'custom_contours.1.png'
set key title "hidden3d firstline sorted" enhanced   center
set key outside right top vertical Right noreverse enhanced autotitle nobox
set view 67, 180, 1.42, 1.05
set hidden3d back offset -1 trianglepattern 3 undefined 1 altdiagonal bentover
set contour base
set cntrparam firstlinetype 101 sorted
set style data lines
unset xtics
unset ytics
unset ztics
set xrange [ 1.00000 : 7.60000 ] noreverse
set yrange [ 1.00000 : 7.60000 ] noreverse
NO_ANIMATION = 1
## Last plot was a multiplot
# saved multiplot
set multiplot layout 2,2 spacing 0,0

set key title "default"
splot x*y lw 2

set hidden3d offset -1
set key title "hidden3d"
splot x*y lw 2

set cntrparam first 101 sort
unset hidden3d
set key title "firstline sorted"
splot x*y lw 2
set hidden3d
set key title "hidden3d firstline sorted"
splot x*y lw 2
unset multiplot