How to get accented characters.
    This works on my Linux-Debian-Gnome system:


        =============================
        hold ctrl and shift and do xy 
        then upon release you get:
        =============================

        x=  c,d,e,f

        cy: ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏ
        dy: ÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞß

        y=  0123456789abcdef

        ey: àáâãäåæçèéêëìíîï
        fy: ðñòóôõö÷øùúûüýþÿ


    Example: ctrl-shift c0 gives: À
    voilà, ( with e0 ).