How to add a grading criteria for assessment

To add a grading criteria for assessments, click the Manage button of your desired course and then click the Instructor Tools button of your desired section.
Click the Design tab and then click the Settings button at the right side on the top bar.
The Settings modal box will open. Provide the grading criteria and grades under the Grade Scale tab, gradebook visibility under the Gradebook Settings tab. Finally, click the Save button.