Is there a way I can customize the grading options for an essay question within the pg code of that question? The default is to allow the instructor the fine gradations from 1%, 2%, all the way up to 100%. Some questions just deserve a thumbs up or thumbs down, and it would be nice to make the dropdown menu only offer [0%, 100%]. Or for other questions, set it to [0%, 25%, 50%, 75%, 100%], etc.
There is not. The grading page is a ContentGenerator thing, not a pg thing. The mark correct checkbox is intended for the first situation.