Hi, > Window content and window decoration are things under control of 2 different applications, either can do compositing or not. Window content painting is always under control of the application - it doesn't make a difference whether compositing is enabled or not. > To my knowledge there is no such thing; Qt5 uses OpenGL underneath. Whenever I cause a redraw of a KDE-5 application, I always see a lot of cycles spent in software rendering/blending loops - even for operations which can be easily done with OpenGL (blits with alpha). > You may discover options when you follow the path through which the functions you mentioned are called, > but you should probably ask this question on the Plasma and/or Qt mailing lists. The kde page "KDE Mailing Lists" only shows this list - and a separate list for developers. Is there a separate list for plasma questions? Thank you in advance, Clemens