Warnings shows up in message window

I have no idea why, but suddenly all my evaluation with warnings (like Sum::div:Sum does not converge) has begun to show up in a message box. Since always they appeared between In[] and Out[]?

How do I make it act normally again?

You can control how Messages are sent under Edit->Preferences. Choose the Messages tab and select your prefered behavior.

• This seems not to work in Mma V11. Christoph Haenel Feb 10, 2019 at 9:36
• This does not appear to be the case in v12 either Oct 31, 2019 at 15:02