You can highlight objects stored in the Name Mapping repository on screen to make sure TestComplete will be able to find them in your tested application.
Note: TestComplete cannot highlight mapped objects in web applications running in remote web browsers managed by Selenium Grid.
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Make sure your tested application is running and the appropriate window or web page is open. 
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Select an object in the Name Mapping repository. 
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Click the  Highlight button on the editor’s toolbar. Highlight button on the editor’s toolbar.– or – Right-click the object and select Highlight from the context menu.  
TestComplete will show a flashing red frame around the object in the application or in the Mobile Screen window (for mobile applications):

See Also
Name Mapping
Locate Mapped Objects
Find Mapped Objects for the Corresponding Objects on Screen
Jump to Mapped Objects From Object Browser
View Images of Mapped Objects
