Is your image skew?
|Skew image||After deskew|
If your image is slightly skew, deskew it by clicking (Auto Deskew – black and white images only) or (Rotate by Line – any image).
Deskewing a very skew image can cause significant deterioration in image quality. If your image is very skew, the best thing to do is to rescan your drawing taking care to get the drawing straight on the scanner.