change background color of dwg previews

[DarioR.]

I would like to know if you can change the background color in the preview window when I want to open a drawing.
during drawing use the black background; in instruments/options/opens and saves/sets preview I see the thumbnail with the black background.
but when I open the window below inevitably appears white.
for someone can be an advantage, personally I find myself much better to locate the content with the black background.
even in exploring resources on win7 appear white, do I have to set up something from there?
edit:
saving a new design or opening/saving an old design the preview appears black.
then the question is dedicated to displaying the preview of old drawings

 

[GP.]

it is not possible, the preview is displayed with the background in use at the time of the last rescue.

 

[DarioR.]

sin.
I should open, save and close all files to solve

 

[MassiVonWeizen]

create a script that only makes opening and saving. there is an excel file in the forum that facilitates you work.
He throws it and does it all alone