Finder (hidden files, icon sizes, list view defaults), Dock (position, bounce behavior, animation), Desktop (screenshot format, location), Fonts (antialiasing thresholds), General (scroll behavior, window animations), Apps (per-app tweaks).

Many settings require a Finder or Dock restart to take effect. TinkerTool has a built-in ‘Relaunch Finder’ and ‘Relaunch Dock’ button — use these after making changes rather than logging out.

Each category has a ‘Reset to Defaults’ button. The main Reset page lets you restore all TinkerTool changes at once, useful before an OS upgrade.