Once you’ve created the links for the items you want in your course menu, you might want to change the availability setting for the link. You choose whether or not a course menu link is visible to students. As the instructor, you will always be able to see the links you have created. If a link has a gray box and a diagonal line next to it, that means the link is not currently visible to students. A plain gray box indicates that the link contains no content.
Hover over the course menu link that you want to edit.
Select the drop-down arrow next to the course link.
Choose Show Link to make the link visible to students.
Alternatively, if you are trying to make a link unavailable to students, select Hide Link.