Apple Logic Pro 8 - Manual (Page 54)

54 Chapter 2 Overview of the Logic Pro Interface
11 Select the software instrument track, then click the Inspector button.
The left channel strip displays the software instrument, and effect of the selected track.
12 Click the Library tab, and browse through the displayed channel strip settings.
As this is a software instrument track/channel strip, only software instrument channel
strip settings are shown in the Library.
13 Select one of the channel strip settings to load it.
14 Start playback again to audition the new sound.