Look carefully at the stepwedge below. You should be able to see 12, more or less distinct, shades of grey in the numbered "steps". The least distinct transition will probably be between the darkest steps (9-12). The grey border should be slightly lighter than step 7 but darker than step 6. There should be no color cast in any area of the stepwedge, it should appear neutral grey. Step 1 should appear the same as the background (white). Finally, the gradient below the steps should be smooth with no banding.
If the screen image is not as described above your monitor needs to be adjusted (sometimes called calibration). Here are some suggestions for adjusting your monitor. This link opens a new window at our 'Bugs site.
