How to chat with other participants during a meeting?

Here is the instruction of how to chat with other participants.

Case one  chat on PC-based app

The way to chat with other participants are the same on Windows and Mac computer.
Click the Chat icon on the bottom of the video screen:

Case Two  chat on mobile app

The way to chat with other participants are the same on Andriod and IOS app.
Click the Chat icon on the bottom of the video screen: