Open Microsoft Teams.

Select Settings and more Teams more icon next to your profile picture.

Select Settings. Here you can modify your settings from the navigation bar:

Under General you will see options to change your Theme, density, and layout.  

The List layout provides an easier overview and is recommended for ease of viewing.  

In Settings you can also change Notification Settings, Accessibility features, enable Privacy restrictions, or alter the default download location.

You are evaluating Refined.