! Please note: Only category Owners have the right to change the sharing options of the respective category. 

  1. Go to Manage > Material Database.
    • Open the to-be-unshared category:
    • Click on the Options at the top right of the page
  2. Choose Manage permissions from the list
  3. Click on Manage in the respective role.
    • Select from the list which users you'd like to unassign from a certain role by unchecking the box next to their name.
  4. Confirm the changes by clicking Save.