import advanced options

Hi, can anyone help me get started with the advanced options in the import/vectorize page?
i’ve been kindly given a couple of directions by tech support, but I’ve been unsuccessful for now in managing to see any difference when adding some options, i understand that the options can easily be conflictual with the basic settings, so I imagine there’s something wrong in the way I’m trying this.
My ideal aim would be to manage to import line drawings to a specific color or better to a line texture AND to a specific color (or color texture)
thx