LOSING ALL TEMPO CHANGES

How, I wonder, do you drag or import or paste in a midi file WITHOUT losing all the original tempo data in the imported midi file????
 
JG

That's a thought.   I realize now that if I load Sonar clean, ie no previous midi files, the tempo of the new midi file is retained.
 
Kinda obvious, I admit.  So I may have just answered my question.  But groove clip makes total sense too....
 
Thanks,
 
JG