Please allow teachers to create custom grade codes in the gradebook.  This goes beyond the missing/late/excused flags currently in the new gradebook roll-out.  Teachers would like the ability to create a letter code for a precise percentage weight.  For example, a teacher could create a code "I" for incomplete and assign a certain percent of the assignment's value.  Some teachers wish to give alternate letter grades for assignments and have them worth certain percents: E (exemplary) = 95%, etc.  #Teachers need autonomy over their own gradebook and this would go a long way to achieving this.  Additionally, allowing teachers to enter letter codes enables the use of "set default grade", which is currently not available with the missing/late/excused flags in the new gradebook.