As admin create a new course and enrol some students. Navigate to your user's Messaging area. Confirm the icon to check messages with users is a chevron instead of an arrow. Create a new Book activity within the course with at least 3 chapters. Navigate to the Book page and navigate through chapters. Confirm Next and Previous icons are chevrons instead of arrows. Create a forum with "Whole forum grading > Grade" = Point. Navigate to the forum and click on "Grade users" button. Confirm students navigation uses chevrons instead of arrows. Testing Component library Install grunt and run  grunt componentlibrary Go to Site administration > Development > UI Component library Search for the icons page and load it (admin/tool/componentlibrary/docspage.php/moodle/components/moodle-icons) Confirm core:i/next is chevron instead of arrow. Confirm core:i/previous is chevron instead of arrow.