Before attributes can be added to a course, the attribute must be created.
- Navigate to the course.
- Click on the "Edit" tab.
- Click on the "Attributes" link at top left.
- Click on the "add attributes to this product" link.
- Check the checkbox next to the desired attributes.
- Click "Add attributes."
- To disable options for the selected attribute click on the "Options" link.
The final step is to add the pricing adjustments for each option.
To add a new attribute see creating pricing attributes.