Hey Dhruv, thanks for following up. I don't want to hide tabs actually, I'm familiar with the option of show sheets as tabs. I just want it to be center aligned nice and clean. I don't see the reason why it is right aligned even when I use Desktop size, or Generic size or Laptop browser size..
Someone mentioned(over the link i provided) on second page that in 10 or higher version all tabs appear under those 3 dots, so thought of suggesting it to you since you guessed that worksheet is right aligned because your tab extend across almost the full width of the screen.