The Know It? options are available if Know It? play mode is selected for a topic. Know It? options for new topics are set in the Options dialog box, but you can change them on a per topic basis. Know It? options include the Know It Required % and Know It Remediation properties.
Warning! Be careful when changing a property for multiple documents that already contain values for the same property. The new values you enter for the property overwrite any existing values for all selected documents.