Reduce amount of screen used by Teams

We frequently have conversations where one of the team members needs to share their desktop and continue to communicate by typing.  We do not use the voice capability most of the time because, if we did, the cacophony of conversations would disrupt the workplace and make effective communication impossible. Most of the time, we share the screen so that all participants can see our ERP system.  How do we reduce the amount of screen used by Teams so that we can view both our desktop and the chat window?