How do you mark activities as optional?

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As per the latest release notes, "the activity completion tracking in New Learner Experience (LX) no longer includes optional activities. "

 

How do you mark activities as optional or required? It seems like everything I add to my content is listed as Required.

 

Edited to add some context:

  • I'm a super admin
  • Our courses usually only consist of Units, HTML pages, and embedded links to tools such as Discussions, Assignments, and Quizzes