The default TLspSelectController shows a pop-up when a user clicks on a location on the map while holding down the Alt key.

lls controllers selection chooser

The pop-up allows the user to indicate which objects must be selected. This is convenient when multiple objects overlap in the clicked spot.

This functionality is provided by the TLspPopupMenuSelectionCandidateHandler installed on the TLspSelectControllerModel.

See the class reference documentation for an overview of the customization options.