When you have created a sound you like, you can save your Rack in a file.
Note: When using REAKTOR as a plug-in, the Rack and all its settings are automatically saved in your host project.

Click the drop-down menu next to the REAKTOR logo, go to the File menu and select Save. Then type in a name for your Rack and save it in a location of your choice.
To recall your Rack, go to the File menu and select Open. In the file dialog, browse to the file you saved, select it, and click Open.