How to set not to empty overlap area?

[sogalaxy (kyoungin kang)]

I would like not to remove overlapped area. Which setting should I change??

[Coffeehouse (Jens)]

Not a pro, but I suppose you could use the Boolean Union:

[sogalaxy (kyoungin kang)]

Thank you so much. I can’t believe, I missed this icon.

[bernd.dk (Bernd)]

With ctrl+B you bring up the Boolean assistant, it shows live which of the options fits the task. Try it, it’s great.