Apple Logic Pro X - Manual (Page 499)

Chapter 16 Mix a project 499
m Option-click an Instrument slot.
You can now choose legacy plug-ins from the pop-up menu.
Replace a plug-in
m Place the pointer over the plug-in slot, click the pull-down arrows that appear to the right, then
choose a plug-in to replace the existing one.
Remove a plug-in
m Place the pointer over the plug-in slot, click the pull-down arrows that appear to the right, then
choose No Plug-in from the pop-up menu.
Move a plug-in
m Drag the plug-in up or down in the channel strip, or to another channel strip.
For guidance, use the colored line that appears when moving the plug-in.
Copy a plug-in
m Hold down Option and drag the plug-in to an unused slot.