Posting grades and feedback
By default, grades are not auto posted. Once an assessment is graded, instructors will have an option to manually ‘post’ grades individually or for all individuals in the course. This option gives control to the instructor to post grades at the right time.
When “Post assessment grades automatically” is selected, an assessment grade appears to the student as soon as the attempt is graded.
View and change the setting
Navigate to Gradebook > Gradable Items, click on the three dots in the assessment row, and select Edit.
Click on the gear icon, and scroll down to Assessment grade
Select or deselect Post assessment grades automatically
If "Post assessment grades automatically" setting on the assessment settings panel is selected, then grades will be posted automatically.
When this setting is de-selected, the instructor will need to manually post grades. Students will see ‘not graded’ in the grade pill until the instructor posts results.
When the instructor selects the option to auto-post, the Post Grades button will not appear.

Instructors can view the automatic grade posting status indicator on the assessment preview panel.

Posting Grades
When grades are NOT set to Post automatically, you can decide when you would like to release them. You can choose to release All Grades or Grades for select students

Post Grades from Gradable items view

Post all grades OR post individual grades
Blackboard Help Resources
Video: Post-Submission controls shows how instructors can control to post grades at the right time.