Once loaded you can now edit by clicking on the pencil at the top right.

If there are outcomes connected to the rubric, you will not be able to edit the outcome in any way.

What you can edit on the rubrics are the title, delete a specific criterion, or add new criterion.

Upon clicking the edit button (the pencil icon) if you scroll to the bottom you'll see a section of options with checkable boxes.

The main two that are using are Use this rubric for assignment grading and Remove points from rubric.