You can add a student to a session(s) anytime between the initial test registration process and the actual test day.
If you cannot find a student, check that the student is registered for the test administration AND is not assigned to a different test session within it.
You can choose to read or watch the instructions below.
Add a student(s) while creating a session:
You can also add a student(s) to an already existing test session...
These contain student sign-in credentials to unlock test sections.
The system automatically assigns the session's form and unlocks those tests.
You only added the student test(s), and the system does not perform any further action.