What is this on timeline? Not able to delete.
This, the little double-sided arrow thing at the top of the playhead, is something that I thought was a marker. It appeared while I was trying to drag the playhead and created and stripped 'range' as I dragged one end of it. It must not be a marker because the marker list is empty. I'm not able to delete this and the song unplayable as the playhead jumps to this 'thing' and is glued to it when I try to play the file.
Help getting rid of this, explaining what it is, how to avoid 'accidentally' making any more of these in the future would be greatly appreciated.
TIA,
Ken
MacBook Pro, OS X Mountain Lion, 8G RAM