Target Button
Pro Tools lets you view multiple AudioSuite plug‑in windows at the same time. The AudioSuite plug-in window provides a Target button. Untargeted plug-in windows remain open, while the targeted plug-in window can switch between different AudioSuite plug-ins and receive keyboard input.
To target or untarget AudioSuite plug-in windows:

Click the Target button in the AudioSuite plug-in window so that it is lit (targeted) or unlit (untargeted).