Hello. I am new to database development. At the moment, faced with such problems:

1) I try to modify the table - but for some reason only 1 row is added constantly (and not 4 - as I need.) What am I doing wrong?
2) From the right in the editor there is a graphical visualization of the database, in the diagram indicated by the arrow there is a table. But for some reason it is not displayed here. Is it possible to fix this?
PS I would be grateful for the advice.