The content being shared during a teams meeting is often too small for readability. The viewer cannot make it bigger. I know that users can zoom in and out with a computer mouse, but that does not work for people who use a trackball.
The Focus button is inadequate. The Ctrl- feature makes the overall window bigger without increasing the font size, and it does this by making all of the Teams function buttons so small that they are unreadable. we need a zoom in and out function like the one that exists in WebEx.