octave:1> test_printing
backend is fltk
print fltk-aifm  -daifm
print fltk-dxf  -ddxf
print fltk-emf  -demf
print fltk-epsc  -depsc
print fltk-epslatex  -depslatex
print fltk-hpgl  -dhpgl
print fltk-jpg  -djpg
print fltk-pdf  -dpdf
print fltk-pdf  -dpdf -append
print fltk-pdflatex  -dpdflatex
print fltk-png  -dpng
print fltk-psc  -dpsc
print fltk-psc  -dpsc -append
print fltk-pslatex  -dpslatex
print fltk-pstex  -dpstex
print fltk-svg  -dsvg
print fltk-tikz  -dtikz
backend is gnuplot
print gnuplot-corel  -dcorel
Error: terminal "corel" does not support continuous colors.
print gnuplot-dxf  -ddxf
Error: terminal "dxf" does not support continuous colors.
print gnuplot-eepic  -deepic
Error: terminal "eepic" does not support continuous colors.
print gnuplot-emf  -demf
print gnuplot-epsc  -depsc
print gnuplot-epslatex  -depslatex
print gnuplot-gif  -dgif
Could not find/open font when opening font 12, trying default
print gnuplot-hpgl  -dhpgl
Error: terminal "hpgl" does not support continuous colors.
print gnuplot-jpg  -djpg
print gnuplot-pdf  -dpdf
print gnuplot-pdf  -dpdf -append
Gnuplot does not have support for 'pdfcairo' ... skipping.
print gnuplot-png  -dpng
Gnuplot does not have support for 'pngcairo' ... skipping.
print gnuplot-psc  -dpsc
print gnuplot-psc  -dpsc -append
print gnuplot-pstex  -dpstex
print gnuplot-pstricks  -dpstricks
print gnuplot-svg  -dsvg
print gnuplot-texdraw  -dtexdraw
Error: terminal "texdraw" does not support continuous colors.
Gnuplot does not have support for 'tikz' ... skipping.
octave:2>