When I import a dwg form AutoCAD the background on my Draftsight is white while the drawing I imported has a black background How can I change my screen to a black background

WS 2012-01-27

I am new at posting so this may be a duplicate>

When I brought a .dwg in from AutoCAD, which had white lines on black background, my screen background is white. How can I change my screen to a black background?