Click on the magnifier icon at the bottom left of your screen:

To search for a candidate: start typing the candidate first/last name or its email address and a list of choices will appear (you will see the status of your candidate: invited, in progress or completed and the assessment to which he/she has been invited):

To search for an assessment: start typing the title of your assessment and a list of choices will appear (you will see the status of the assessment: active, archived or draft as well as the owner of the assessment):