As far as I have read on this board the only control you have in the numbering sequence is to have an existing file on the card, and the numbering will continue from that point. What I have found annoying is the is no distinguishing set of numbers even across file types... so you will have (for example) YUN00001.mp4, YUN00002.mp4, YUN00003.mp4, YUN00004.jpg, YUN00005.jpg, YUN00006.jpg, YUN00007.mp4, YUN00008.mp4
The only way to tell the different files is by the timestamp... as people have mentioned it makes it difficult (for example)
to tell between single photos and a panorama sequence... and if you have to wait, say from 11:02 while taking your single
shots, to 11:04 to take a panorama sequence. And all the while, you're watching the battery voltage drop on the ST16.