To edit/delete assessment grading, follow these steps below: 

How to edit assessment grade  

1. Click on Configuration on the left menu pane 
2. Select Grading format on the list of menus displayed
3. Select a Class you want to edit
4. Click on Grade 
5. Click on Edit grade
6. Type the Description of the grade and click Save.

How to delete assessment grade  

        1. Click on Configuration on the left side

        2. Select Grading format on the list of functions displayed.

        3. Select  a Class that you want to delete

        4. Click on Delete and select Ok.