Apple Logic Pro X - Manual (Page 735)

Chapter 22 Surround in Logic Pro X 735
Set a channel strip output format to surround
m Click-hold the Output slot of the channel strip, then choose Output > Surround from the
pop-up menu.
The Pan control of the channel strip is replaced by a two-dimensional Surround control. The
loudspeakers are represented by colored dots and the pan position is indicated by a white dot
that can be moved. For more information, see
Surround Panner overview .
Set the output format of multiple channel strips to surround
1 Select all channel strips that you want to set to surround output.
2 Click-hold the Output slot of one of the selected channel strips, then choose Output > Surround
from the pop-up menu.