I found a post about doing triplets through using the delay but I haven’t been able to produce drag triplets(quarter note triplets) with the delay so far. I could very well just not doing it right, but I can produce regular eighth note triplets. How do you make drag triplets?
Try this on for size:
https://forum.renoise.com/t/triplets-in-renoise/44747
Easiest method for me is using a template song with an LPB of 12 or 24. Then make collapsed/minimized tracks that have repeated silent notes for 1/4 and 1/3 to use as a visual template.
6486 
Cheat on the math and make 2 beats of triplets in a row and delete every other note.