This article covers the Annotation Grading interface, and gives information on controls for using Marking Workflow.
Back in Moodle version 3.1, the Grading interface was redesigned to give you a faster, more convenient work flow for marking Student assignments. The improved grading interface also makes it easier to annotate student documents on the screen, right within Moodle.
Annotation and Grading
This brief video from Moodle HQ introduces the new grading screen, and describes how it is used. The second video shows a wonderful improvement that came into effect as of Moodle version 3.3.
Marking Workflow
For Assignment Activities, Moodle's Marking Workflow lets you control the release of grades to Students manually or according to a schedule.
This features is described in more detail here: https://docs.moodle.org/39/en/Assignment_settings#Grade:~:text=Marking%20(grading)%20workflow