Pro Tools 101_ An Introduction to Pro Tools 11 ( PDFDrive )

processing, effects are added by a plug-in applied to the send signal; the
processed signal is added to the mix through an auxiliary input channel.
The return inputs provide level and pan controls, allowing precise control
over how the reintroduced signal combines with other audio in the system.
The Pro Tools Mix Window
Many of Pro Tools’ mixing operations and functions are performed using the
Mix window. The Mix window in Pro Tools is similar to a standard mixing
console. If you are acquainted with mixing console functions, the Pro Tools
Mix window will be familiar territory. This window offers a variety of
display options, many of which can also be customized.
The Mix window can be displayed or hidden as needed. To toggle the Mix
window display on or off, choose WINDOW > MIX. If the Mix window is
already open but is inactive (such as when it is hidden behind another
window), this command will make it active, bringing it to the front of the
display.
Tip: Press CTRL+= (Windows) or COMMAND+= (Mac) to toggle between
the Mix and Edit windows.
Figure 9.1 Mix window controls