Basic Mixing : Output Windows for Tracks and Sends : Opening Multiple Output Windows
 
Opening Multiple Output Windows
Multiple Track Output and Send windows can be displayed simultaneously using either of the following methods.
To open additional Track Output or Send windows:
*Shift-click any Track Output Window button or Send Assignment button.
To set a window to remain open when opening additional Track Output or Send windows:
*Make sure the Target is disabled.
Multiple Send windows open