You can copy a Global Rack sound (for example, a synth such as Omnisphere) to your project's Private Rack, and Synfire "strongly recommends" that you do so. This will avoid the tedium of setting up that sound from scratch for each new project, and at the same time preserve the settings of that now-private sound for the next time you open that project.
- Assign a sound from the Global rack to an instrument on your instrument sheet.
- In the Parameter Inspector for that instrument, select the Instr. tab.
- Click the down arrow to the right of the sound's name (in this hypothetical case, Omnisphere) to show the menu.
- At the bottom of the menu you will see "Copy to Rack." Click this to copy the sound to the Private Rack (aka "Rack"). If Copy to Rack is grayed out, it's because the sound is already private.