There may be circumstances where you need to change the property in your dataset which is used as the index.
You can identify the indexed property in the Property pane. It has a node icon alongside it : -
To change the indexing to say the ID property, simply tag the ID property with
Click OK in the Property tags pop up, then OK in the Edit Property pop up, and finally click Refresh (top left of the toolbar).
This will reassign the index to the ID property.