Comment 8 for bug 1818550

@Anton, don't get too used to the legacy canvas(F9), it's going to be removed for V6. Both modern canvases (F11 and F12) support full transparency on every layer. It just defaults to no transparency. You are free to customize layer color and transparency until you get the exact results you are looking for. The legacy canvas drawing mode (XOR) is slowly be removed from most platforms rendering code so it's only a matter of time. It is unlikely anyone will find the time to fix this bug since the code is going to be removed.