This location on Moodle will help you to set Letter grades: Home / ►Site administration / ►Grades / ►Letters
Would a different grade display type suit you? The default is real i.e. actual grades, but you can choose to display Real (letter) or Percentage (letter) then the letter is shown in brackets after the grade e.g. 85 (A). Please see the documentation Grade letters for more information.
Thank you Helen and Ankit for your replies.
Sorry, but I mean to add a new item from the categories and items a letter column which should translate the total "category/course total" into the equivalent letter.
Also the "Course total" is not editable. I can not change it to letters (real)!
I think we have a tracker item on this but if editing is on, the course total (2.8 or later) will only show as total points. Turn editing off and it will then respect the setting.
Yes, that's the one! Please vote!
Thank you Emma and Helen for your replies and advice.
Yes Emma I voted.