AutoCAD Raster Design

[#1]

I am using AutoCAD 2010 and Raster design.   When I insert a tiff file sometimes the background come in white. This makes manipulating the tiff impossible.  I work with Raster design every day and this problem comes up periodically.  Is there any way in Raster design to change the white background to the normal black?  If not is there a software that can?    

I appreciate any help anyone can give me.  Thanks in advance. 

[#2 · Accepted solution]

In Raster Design GO TO:

Cleanup

invert( select the entire tif)

Next step

Image Processing

change color depth

Bitional

You should now have black background/white graphics for your tiff

[#3]

Thank you susanne.frisco, that worked beautifully.  Thanks again.