in graphs give an option to set the color of the plot and the thickness

[dericed]

for instance to say that

qctools/Source/Core/VideoCore.cpp

Line 276 in 0573c33

{ Group_Y, Group_VideoMax, "Y AVG", "lavfi.signalstats.YAVG", 0, false, DBL_MAX, DBL_MAX, ActiveFilter_Video_signalstats },

should be drawn with 2pt thickness and yellow.