I had a basic MIDI Editing question and this thread has some very valuable information – worth seeing.
H/T: to Vic and Brian Roland for generously sharing their knowledge. 
Short story: From the main project window, experiment with “sizing moves contents” and "sizing applies time stretch.:
Take a simple part in straight eighth notes and make it play in 16th and so on. But, there’s a lot more – particularly making better use of the Logical Editors in Cubase.