Hello Hirama666
Hirama666 i would like to extend the character limit from only 5 characters to 10 characters.
This is not possible, unfortunately.
Grades were designed to be letters, like for the US grading scale (from "A+" to "F").
Or numbers (from "5" or "10" or "20" or "100" to "0", with at most 2 decimals).
So 5 characters are enough.
Can't you use an abbreviation and then add the legend somewhere on the Report Card?