Follow the below steps to invite candidates to participate in a test:

1. Go to the test in which you want to invite candidates.
2. Click on the "Invite Candidates" under "Invite" option present in the left vertical menu.
3. Enter candidate's email ids one by one or upload bulk in CSV format.
4. Modify email content and send the invitation mail to the candidates.
5. If needed, save the mail template to reuse it in the future.