There are times I have done this if I am not sure if the person at the other end is presenting/sharing screen and the matter is somewhat sensitive. If that scr

There are times I have done this if I am not sure if the person at the other end is presenting/sharing screen and the matter is somewhat sensitive. If that screen sharing software world and messaging/chat software works had some sort of protocol/handshake not to step on each other, many frustrating situations can be avoided.