snap-to-string-data-switch ("stps")
See this command in the command table.
To access this command:
- 
                                                    Home ribbon >> Snapping >> Snap To>> Strings. 
- 
                                                    Use the quick key combination "stpp". 
- 
                                                    Using the command line, enter "snap-to-string-data-switch". 
- 
                                                    On the Find Command screen, highlight snap-to-string-data-switch and click Run. 
Command Overview
Enable or disable snapping to string data in a 3D view.

