To Adjust the Image Bias

1. Click Raster menu CleanupBias.
2. If you have not already selected an image, select the image you want to correct, and then press Enter.
   Note: You can select your image or images before you select the Bias command.
3. Click a point in the drawing to use as a base point, or press Enter to use the origin as the base point.
4. Enter a calibration distance for the X direction by selecting two points to represent the distance, or enter the distance in AutoCAD units on the command line. Then enter a desired distance for the X direction using one of the two methods, or press Enter to leave the X direction unchanged.
5. Enter a calibration distance for the Y direction by selecting two points to represent the distance, or enter the distance in AutoCAD units on the command line. Then enter a desired distance for the Y direction using one of the two methods, or press Enter to leave the Y direction unchanged.