Thread title says it all. But if you don't know what these are, it's a tuplet inside of another tuplet. E.g. A 1/2 note triplet with each of the half notes involving its own tuplet, like 5 1/8ths in the space of 4 1/8s, etc. Finale and Sibelius can both do this, but of course they're dedicated notation apps. Do the Logic developers happen to read this forum? If not, then is there a place I could send this request where they'd be more likely to see it?