As teacher, create a workshop activity. Switch to the Submission phase. As student 1, enter a submission. As teacher, switch to the Assessment phase. In "Assessment form", set the description of Aspect 1 to "Aspect 1" and the points to "Type": "Point" / "Maximum Grade": 20. Under "Submission allocations", allocate the grading of student 1 to student 2. As student 2, grade the submission by student 1, Setting "Grade for Aspect 1" to 20. As teacher, switch to the Grading evaluation phase. Click the "Re-calculate grades" button. In the student 2 row, verify the Grade for assessment says 20. Click the grade for assessment grade (in the "Grades given" column). Set "Override grade for assessment" to 18 and save with "Save and close". In the student 2 row, verify the Grade for assessment says 18. Click the grade for assessment grade (in the "Grades given" column). Set "Override grade for assessment" to "Not overridden" and save with "Save and close". In the student 2 row, verify the Grade for assessment says 20.