Color Intensity With Multigraphics

hello everyone, I’m plotting numbers of graphics with the same colour, I want to change just the transparency of the colour, like the attached screen below.
how can I do It ?

Try with SetLineColorAlpha()


hi, Stefano thank you for the replay.
but the plots are still the same

You need to use a GL canvas.

TColor → Color transparency

grep -r PreferGL ${ROOTSYS}/t[eu]*

I didn’t get, since i’m beginner could please give me an example

Transparency is not available with all graphics backends.
If you are running root on a Linux machine with X11 you will first need to
turn ROOT into GL mode with the command:


thanks for your answer exactly I’m using the Linux subsystem.
thanks, it works.

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