Any element that has been modified from its default state will show visual indicators that for the properties that have changed. But you may want to revert all changes. You can do that with the Reset All Property Changes button.
In the image below, there is one property that has been changed. It has a blue border next to it:
If there are property changes the Show Property Changes button and the Reset All Property changes button are active.
Click the Reset All Changes button to revert to the default options.
If there are no changes made to the selected element then these buttons are deactivated.