On the nav bar, click the Activities menu, then select Rubrics.
On the Rubrics page, select the name of the rubric you wish to edit.
Add more levels by selecting the + icon either to the left or right of the Levels. Selecting the + on the left will add a Level 5 and so on. Selecting the + on the right will add a generic Level called New Level. Add corresponding descriptions, score, and optional initial feedback.
To add criteria, click Add Criterion. Enter a name for the new criteria. Add corresponding descriptions and optional initial feedback.