Login as an administrator Select the Clean theme Navigate to 'Course administration' -> 'Courses' -> 'Manage courses and categories'. Under the 'Course categories' section with 'Create category': Create a top level category called 'Odd'. Create a sub-category within 'Odd' called 'Odd odd'. Create a sub-category within 'Odd odd' called 'Odd odd odd'. Observe that no 'list style' icons are present. Repeat from step 8 for the More theme.