In addition to patches, you can view and choose the following file types in the Library, when the corresponding item is selected:
Plug-in presets (.pst)
Channel strip settings (.cst)
EXS instruments (.exs)
Environment instruments, and programs or banks of MIDI instruments created in the Audio MIDI Setup utility
ReWire MIDI instruments, and active ReWire hosts
In the inspector, click immediately to the left of the plug-in slot on the left inspector channel strip.
To view patches again, click immediately to the left of the Setting pop-up menu on the left inspector channel strip.