You can use the Number of Mix Panes button to change the display from 8átracks to 4. When you select 4 tracks, a menu appears that allows you to display the first 4 or last 4 tracks that are enabled.

You can further simplify the Audio Mix Tool display by clicking the Display/Hide Sliders button to switch between hiding and displaying the Volume Level sliders.

With the tool collapsed, you can continue to adjust levels by selecting a track and typing values using the numeric keypad on the keyboard, or by typing a value into the Volume Level display.

You can resize the entire Audio Mix tool by dragging the edge or corner of the tool. You can resize the Audio Mix tool only when the sliders are displayed.