You create a great assignment; students start submitting; you start grading; and then you realize: you forgot to set your preferred posting policy!
You should have remembered to go to the gradebook, and set it, but you're busy, and you forgot.
It shouldn't have to be that way! Grade posting policies are an integral part of the assignment, like the total point value and assignment group, and you shouldn't have to go to a different page to set it: Grade posting policies should be configured from the assignment settings.
Please allow instructors to configure/set a grade posting policy for an assignment directly from the assignment editing page: