What is focus mode?
Focus Mode

It's something you can enter to get rid of most of the stuff except the board while playing:
To enter it, hover over the resize control and click on the Focus Mode button:
(Note that you have to be in the "New Chess.com" in order to try it out — if you're not already, go to https://chess.com/switch or click on "Try the new Chess.com" at the bottom of the page.)

How can I make the board to be in the middle of the screen? When I focus mode the board keeps in the same position. everyhing else disappears but the board doesn't move.
And how can I activate it in tactics trainer?

@SkyMarshal It seems to depend on how wide your window is currently. We don't have it in Tactics Trainer yet but that is a nice idea
@dr_chessdad When you get a draw offer it shows up next to the draw button:

hello, i love the focus mode too, but i have a problem...How do you leave it????
In the top right corner, there's the icon of 4 arrows pointing inwards

I'm sure most players love this focus mode...can you please adjust one thing though?
You know the little + numbers that tell where you stand materially? like +3 +1 ? Those numbers are in white and very hard to see against the moon background. Can you just change the numbers to BLACK? So they're easier to see. I'm sure it's a small change for the programmer to make. Thank you. Great job on the focus mode.

@staff: soryy, may i'm a little bit stupid, i saw the icon with 4 arrows, but when i click on it, it gives me the initial time (5 Mn for instance) but nothing else happen...i stay on "focus mode"..itriedto see anywhere else to click, i dont see nothing, and i have to disconnect to getaway and comme back to chess.com....(i'm frenchman, is there any "user mode" in french for the focus mode somewhere? Thanks

If you're not playing or observing a game it will show you the board and the clocks, but also a couple of buttons you can use to create a new game (in much the same way as when you enter Live):
If you're already playing or observing a game, that game should be shown on the board.

@staff: soryy, may i'm a little bit stupid, i saw the icon with 4 arrows, but when i click on it, it gives me the initial time (5 Mn for instance) but nothing else happen...i stay on "focus mode"..itriedto see anywhere else to click, i dont see nothing, and i have to disconnect to getaway and comme back to chess.com....(i'm frenchman, is there any "user mode" in french for the focus mode somewhere? Thanks
That's odd - when I hover my mouse over that icon, I see the text "Exit Focus Mode", and clicking on it switches it out of Focus Mode back to the original. Can you post a screen shot of what you're seeing?
I don't know if the FAQ and Support articles have been translated into French, but the English versions don't include instructions about Focus Mode yet either - sorry.

No it's ok now..i tried 5 minutes ago, and the "exit focus mode" appeared....Maybe a wrong click from , i dont know, but anyway it works...The "new" chess.com is better, more ergonomic and style...AND i can play 960 now, yeahhhhhh!!!!! ;+)
I absolutely love it! Whoever thought of that deserves a raise. Good job chess.com!