Note Vibrato

In FL Studio I used to use a trick to get note vibrato from my VST instruments. First I’d turn on mono mode and portamento.

Then I’d long play a note “C” and then while that was playing I’d add “C#” notes on top of it in short steps (1/4s) and the note would vibrato. I’m trying it in renoise but it doesn’t work the same. Can I vibrato a VST note?

You can, you just have to take into account that in a tracker the next note down will cause the note above to release, so you have to make one note column for you “long” note and one for your other notes/noteoffs.