On the igs client they use a toggle like button. Can’t say if i prefer scroll down or toggle
The most crucial for me is
1 to be warned there is something in the chat that i didn’t read yet
2 to have easyness to look at it (like no misclick because i touch the board when i scrolldown )
Small note on the headers. Is there a reason for not having the players frames aligned vertically (middle)? Some more different levels of grey may reinforce the constitution of the teams