In Market Depth Settings the Active range trade count is indicated by a yellow vertical line that shows the range of values for the last “x” trades, as defined by the number entered in the Market Depth Settings dialog box.
Split Bids & Asks will display the bid size and ask size in their own columns with bid sizes on the left, prices in the center column, and ask sizes in the right-most column.
The example below display Split Bids & Asks.