The Settings are organized in the following categories:
The OK button applies the changes you made for the current session, and closes the dialog box. The Apply button applies the changes for the current session, but keeps the dialog box open so you can make more changes. The Close button closes the dialog box without saving or applying changes.
The Export button opens the Export Settings dialog which you can use to select which settings to export, and where to save them. Exported configuration settings can be applied to the experiment when you open it again in future Performance Analyzer sessions as well as the current session. You can also use configurations for other experiments. See Performance Analyzer Configuration File for more information.