The Change Log shows 2 grade columns with grade changes. When viewing a class with the grade changes, the bottom section is the first change that was ever done. The top section shows the current grade without any changes.

To view the change log:
  1. Under Academics
  2. Grades > Grades Management 
  3. Enter Grades by Student - search the student
  4. Click View next to Grades & Credits
  5. Click the PDF icon in the upper right to see the Change Log