what is that square thing in the middle of the display?

Asssume we have no idea what on earth you are talking about.

Because we don't.

At least give us a bit of a clue what the blazes you are talking about

I assume it's a microwave - yes?

If so, make and model and a bit more to go on in addition to a "square thing" and "this oval thing"

Without that the best we can offer is

"some thing"

Puzzled
July 2015