Before you publish a course, you can see how your students will see it. This can be done in two ways: from the course list and from the course itself.
Option 1 — Previewing a course from the course list:
The course will open in preview mode. To return to edit mode, click the Back to editing button
Option 2 — Previewing a course from the course itself:
To go back to edit mode, press the Back to editing button as well