Well this is the entire question, how are you drawing this in Cubase?
Do you mean manually calculating the lengths and adjusting accordingly?
If you want to be precise, calculating is actually a good idea.
A 1/16th note has 120 ticks. 120/16 ≈ 7.5
So every note ought to be some 7 ticks shorter than the previous one.
I can select all and then either shorten them by the Length field in the info line or by making a key command to this Logical Editor preset.
Either way after each alteration I Ctrl-click the leftmost selected note to deselect it.
Then repeat.
I can also put 16 1/16th notes over each other, use the trim tool to shorten them and then manually put 15 notes into the correct position.
Both ways I am done in under 5 minutes.
Sorry, but your question was about automation. Not about how to draw in 16 notes with different lengths. I was under the impression you need to change the note length periodically over the course of the track.
Very helpful, thanks.
Just tried the trim method and it does the trick 
As a side question, how did you add the note numbers alongside the the notes? I’m checking through the preferences now but a tip would be helpful.
Yes, this initial question was about automation however once it was discovered this isn’t possible the discussion then moved to workarounds such as the one you presented above.
Ok, just a quick note: What you referred to as “midi trigger” are called note events. Midi trigger is a general term as it could be any Midi message (controller, pitch bend, prog change, note, etc.)
Ah, fine. Understood.