After selecting the period, the specialisation rows published for the period can be seen.
A specialisation row can be taken before the specialisation period ends.
The specialisation row can be taken with the Register button.
By clicking the Register button next to the specialisation rows, the status of the selected specialisation row changes to Pending, and blue colouring appears at the beginning of the row.
No more specialisation can be selected. From this point onward the change of the specialisation row can be performed with the Change to button, and the specialisation can be dropped with the Drop button!