The Mixer: An Introduction
The Mixer is used to control the interaction of different tracks in your music document. If you want one part to sound louder than another does, for example, you use the mixer to adjust the volumes to get the mix sounding just right. The Mixer is also used to select tracks and set characteristics such as Mute, Solo and Record states.
Each track indicator displays the track name, volume, and status. The master area contains master controls that affect the performance of all tracks. Tempo, for example, is controlled in the master area.
The Mixer can be docked/undocked to the main application window, just like a toolbar. When the Mixer is undocked you can resize it horizontally to take up less screen space.
For detailed information about the Mixer click here.