Change The the beginning and the ending, nondestructive
I wish Samplitude to split the MIDI object nondestructive (like Waveform, Studio One, Cakewalk), and accordingly the same things to be done outside, from a folder track.
In Cakewalk for example, the MIDI objects can be spitted/cut non destructive. Further, more Midi tracks can reside in a folder track and can be applied split command nicely. There is a way to enlarge or reduce the folder track nondestructive in order to arrange or rearrange to contain inside it. Here is the video: