How do i split horizontally a single cell in two sectors?

I need this in order to put text in the upper half and some other text in the lower half.

In older versions this was possible (before v4).
Now i cannot find how i make this happen.

Very frustrating. Any ideas?

It was never possible to split one calc-cell into two.

you only can insert
linebreaks into Cell with ctrl+enter

OK ty!
I found a way using writer