Apple Logic Pro 9 - Manual (Page 269)

To insert software instrument, Audio Units Generator, or MIDI-controlled effects
µ
Click the Instrument slot of an instrument channel strip, then choose the software
instrument plug-in, Audio Units Generator, or MIDI-controlled effect (name and type)
from the Plug-in menu.
Tip: You can simply choose an instrument name to insert the instrument in stereo on a
stereo format channel.
The plug-in window of the chosen instrument, effect, or generator opens automatically.
If you don’t want the plug-in window to open automatically after insertion, deselect the
“Open plug-in window on insertion” preference in the Logic Pro > Preferences > Display
> Mixer pane.
You can adjust all plug-in parameters in the plug-in window. For more information, see
Adjusting Plug-in Parameters .
To remove a plug-in
µ
Click the Insert or Instrument slot, then choose No Plug-in from the menu.
To replace a plug-in
µ
Click the Insert slot, then browse to the appropriate plug-in type.
Moving Plug-ins
You can use the Hand tool to move instruments and effects between channel strips.
269 Chapter 10 Working with Instruments and Effects