Can I use more than one LO scale on a course (level-4 object)?

Also answers:

• Can I use ESIL and Marzano Complexity at the same time on a course?
• How many learning objective scales can be used on one course?

Yes, you have the option to apply two different LO scales at a time to individual course (level-4 objects).

Related articles: 

• What LO Scales are available in CourseTune?
• How do I choose or change an LO scale?
• How do I see the visualization of LO scales on the circle graph?

Below is an example of viewing one LO scale: First by a single selected level vs. all LO scale levels selected. Notice the grayscale variation across the circle graph.