Apple Logic Express 8 - Manual (Page 219)

Chapter 10 Working With Instruments and Effects 219
To set the channel strip input format for the selected audio track:
m Click-hold the button directly below the level meter on the Arrange channel strip, and
choose the desired input format from the menu.
∏
Tip: On a stereo or mono channel, you can simply click the button to switch between
mono or stereo.
 Mono: One circle represents a mono input format. The level meter shows a single
column.
 Stereo: Two, interlocked circles represents a stereo input format. The level meter
divides into two independent columns when a stereo input format is chosen.
 Left: Two circles, left one filled, indicates a left channel input format. When this input
format is chosen, the channel strip only plays the left channel of an audio file.
 Right: Two circles, right one filled, indicates a right channel input format. When this
input format is chosen, the channel strip only plays the right channel of an audio file.
Left Stereo Right Mono