The editor tab will show all the save objects in your project in one place. You can expand/collapse any section or field at will and any edits made to any save data will apply to the save file so you can use it to debug & test parts of your game. Note that you can only edit the save while in edit mode. If in play mode the editor will be disabled.

If you want to reset a value you can press the red – next to the save value, this will reset the value to its type default. You can reset all on an object by pressing the same button next to the object dropdown.