I see what you mean. I think it's because unlike the full desktop NLEs, the clips on PD Mobile's timeline always snap together and there isn't any obvious way to leave a space in between. Maybe moving clips in a block would mess that up somehow, but it seems like the selected block would just flow to the new position when you dropped it.
Either way, you can request that functionality by going to
Settings then
FAQ & Send Feedback.
This message was edited 1 time. Last update was at Apr 15. 2020 23:18