The Backup Search is a new feature in Test Studio. If the Find Logic of an element fails, Test Studio uses the XPath for HTML based applications or XamlPath for Silverlight based apps as a backup search option.
The xpath for the element is stored in the test XML. If you open the .tstest file with a text editor, you'll find the "BackupSearchClause" tag where the xpath is stored(see screenshot).
However, the easiest way to get the xpath of an element is to bring up the Find Element
menu for the specific element from the Elements Repository. Then connect to the live page and use the Suggestions. From there you can also edit the find logic and set the xpath as a default search option for the target element. Check out our Find Elements article
for more information on how to change the find logic.
the Telerik team