Click on the student's name in the spreadsheet view to see more details on that student.
Across the right of the screen is a summary of the student.
In the summary, you can already see the following details of the student.
Agent can be manually changed here.
In the same page in the middle, you can add and delete tags.
Student's stage can be changed by clicking on the blue drop-down selection.
To go back to the spreadsheet view, just click on the 'Student' button.