after the installation from x.org

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http://www.linuxquestions.org – how to give my screen a pretty looking without to decide which kind of high performance window manager i will use later? I actually use twm, it is going well (it was not easy to find a good template for .twmrc, but I did found one and it is working well), but I don't see how to put a background picture on the screen! Same for a splash picture for grub. my grub.cfg contains the line background_image /boot/background.jpg uncommented but nothing appears (my screen is a digital display 1920 x 1080 pixels) (HowTos)