I confess that I was also a little confused when they announced this change, but apparently the only thing they did was increase the size of the window. As a result, the number of categories that you can view on the left side without having to scroll the mouse has increased. Another significant change is that you can now view all information about sell/buy offers without needing to hover the mouse over them. In the past, when an offer had a very high value, there was no space to display all the digits, so it was necessary to hover the mouse over the offer to confirm its value.