Question

What  is  this sign ( in the left lower corner  of  each event) meaning? I m using studio one for  years, but  never  know what  that  is  for?

And some times instead  of   that sign, it is a  * .....

What that  really  mean?

Answer 1

It means that the event is 'merged', i.e. it contains several samples inside of it.

In order to unmerge it, you need to right-click -> audio -> dissolve audio part.