After you have integrated a copy of TinkerTool into TinkerTool System, you can work with any of the panes of TinkerTool directly from the System application, so you no longer have to start both programs separately to access their full feature set.
Panes of TinkerTool give you access to advanced preference settings built into macOS which are not visible in the standard System Settings application or in the settings windows of applications, like Safari. To change one of these advanced settings, perform the following steps: