Table inside another table - how to add rows?

I have a table (call it B) inside another table (call it A).
How do I add rows to table A ? The cursor is always on the inner table (B) so I can’t add rows to the outer table (A).
I need to add a row before the first row of A.

(In reality:
I have one table and in every cell of that table there is table with a varying number of columns.
I need to add a row before the first row of the outer table (A)
)

If you come to the last cell in table B, then just press Left or Down arrow. You will enter the cell in table A that holds table B. And then you can Right Click → Row → Insert or use toolbar to insert rows/ columns.

How do I add a row before the first row of A?

Once you are at the end of the table B, use press Alt+Enter or arrow keys and you will be inside cell in Table A. Now, you can find in “right click” menu “Insert Row Above”.

Hi

The idea is to click outside of the “inside” table B (possibly create a paragraph before or after by Alt+Enter in the first or last cell). Insert row command will be functional.

Regards