How to prevent distracting pop-up chat box when chat window is closed.

I am allowing participants to chat during my webinars, but some participants prefer to close their chat window to avoid being distracted by chats. But then they see a distracting pop-up box in the lower center of the Zoom window every time s new chat appears, even when their chat box is closed. Is there any way to allow chats but turn off this chat pop-up box?  Thank you!