DESCRIPTION:
    Eccet is a three dimensional volume segmentation and rendering
    system. Some operators work along a given axis of the volume.
    Whereever you can specify an axis, this can be done using either
    the characters x,y,z (or X,Y,Z) or numerically using 0,1,2.
    Note, that due to historical reasons, some commands might only
    take the numeric versions. This is a bug. Please notify us, if
    this happens to you.
