Transparent filling for TPolyLine

Dear experts,

I have a TPolyLine.
I see it inherits from TAttFill and therefore it should have the SetFillColorAlpha() method. But it doesn’t!
So any idea about how I can set the transparency of the filling?


Which graphics backend are you using ?

Transparency on screen works when you set the OpenGL Backend (on all platforms).
In $ROOTSYS/system.rootrc you should have:

OpenGL.CanvasPreferGL:                      1

On Mac it works also with the Cocoa backend

On output file it works with all binary files (pgn, jpeg etc…) and with pdf

Note: all this is clearly said in the doc here:

Thanks for your answer. I overlooked those two lines.