For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
Grade Book Comments are notations placed in Grade Book that appear in place of or alongside of an assignment’s mark. Missing, excused, and late are examples of comments. Similar to other Grade Book Setup components, teachers can add their own comments. If you edit district-created comments, they are duplicated with your changes. The original comment remains untouched.