I could set the font colours via ESC sequences and place the picture in the background now. I did not yet understand why it does not show up when I set the attribute in the initial attribute list with all other window attributes like "no closing gadget" and such but have to place the attribute inside the VGroup definition where the object itself is to make it work. I thought "the more up, the more global it is". But then the attribute gets ignored. I expected it to be globally in the background of all my windows then. Why could that be that it only works locally?