Yep my point was clearly for freeform mode (I updated the title and topic to reflect this). Sorry for not precising it in the first place, I thought it was obvious as for the quantized mode afaik the size of the measure is actually pre-determined by the song properties…
But just to ensure we’re on the same page, I am talking about the minimal track length, yet nothing should prevent me to record a track which length would be a multiple in length of the original (first) track. It just depends on when I click on “Play” to end the recording.
But I am not talking about the length of the loop (part) which should still be aligned to the longest track of the part (when I hit “next part” or “stop” for example and even “Record”) as it would make no sense to stop or to switch to another part in the middle of any of the tracks. Maybe to start to record it could be debatable but this options seems the simplest (maybe it could deserve a config switch…).