Set next window background color alpha.
alpha
Window background opacity, from 0 (transparent) to 1 (opaque).
helper to easily override the Alpha component of ImGuiCol.WindowBg/ChildBg/PopupBg.
you may also use ImGuiWindowFlags.NoBackground.
Icons made by Lorc, Delapouite & Skoll · game-icons.net · CC BY 3.0
Set next window background color alpha.