Answer:
You can create custom grading scales in a Course, Program, or via Institution Config so they can be reused.
To add a new scale in a course or program, go to Details → Custom Grading Scale and click New Custom Grading Scale.
Give it a name and rounding option, then use the “+” icon to add items (Grade Name, Percentage, Grade Point).
To reuse an existing scale, first create it under Institution Config → Courses → Custom Scales.
Then in your course or program go to Details → Custom Grading Scale → More Actions → Add Custom Default Grading Scale.
For full instructions and examples, see the Grading Scale documentation.