To preview a course that’s under development without making it visible to other learners, do the following:
1. Assign yourself (the developer) to the course under the People tab
2. Under the SETTINGS tab:
a. ENABLE the ACTIVE button
b. DISABLE the COURSE LIBRARY checkbox
3. Now you can use the orange 'Switch to learner view' button at the top right to see what your learners will see.
You can also use your green 'Preview Course' button that is located in the Content tab for the course. A course can be previewed using this tool without making the course active first.