In the Mixer in Logic Pro, click an empty plug-in slot on a channel strip, then click the search field at the top of the plug-in menu.
Enter the plug-in name in the search field. As you enter text, the results list shows matching plug-ins of the corresponding type (audio, instrument, or MIDI).
To add a matching plug-in to the slot, select the plug-in in the results list.
In the Mixer in Logic Pro, click an occupied plug-in slot on a channel strip, then click the search field at the top of the plug-in menu.
To replace the existing plug-in with a matching one, select the plug-in in the results list.
In Logic Pro, choose “Search and Add Plug-in” from the Mix menu in the control bar (or press Control-Command-P).
Enter the plug-in name in the search field.
To add a matching plug-in to the first free Audio Effect slot on the focused channel strip in the Mixer, select the plug-in in the results list.
Note: When the focused channel strip is a software instrument channel strip, and no instrument plug-in has been added to the channel strip, the search results show instrument plug-ins rather than audio effect plug-ins. Selecting a plug-in from the search results adds the plug-in to the Instrument slot on the focused channel strip.
Download the guides:
Logic Pro User Guide: PDF