Perhaps your student needs to bypass a lesson, or wants to retake a lesson. Admins have the ability to mark a lesson complete or incomplete for a student, essentially resetting a student’s progress.
Head over to LifterLMS –>Reporting–>Students and select your student
Next select the course that you want to view.
After you select a course you will be able to manually mark a lesson as complete.
You will also be able to manually mark a lesson as incomplete.