Focus mode
If you find the chat window, rating, menu bars, or anything else on the screen distracting when you play chess, you may want to try focus mode!
Follow these steps to enable focus mode:
Hover your mouse on the top right of the board and click the 'Focus Mode' icon (arrows pointing outwards) under the settings gear. The focus mode icon appears only when you move your mouse into the area
When you enable focus mode, the board will expand, showing only the board, clocks, and the draw and resign buttons
To exit focus mode, simply click the x icon on the upper-left corner: