it will very nice to manage styles (specially color) for plot-title in key for plot (may be, 3d splot aslo...). An example:
"plot sin(x) title "sin(x)" textcolor rgb "green", cos(x) title "cos(x) tc red"
If exec this "wrong" code with gnuplot, the title "sin(x)" in key box (or legend) will be green, while "cos(x)" -- red.
Thanks for your attention!
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