Coloured, multi-level marker ranges
In Pro Tools, you are able to set coloured, filled-in range markers on more than one line. It makes it easier to group your music sections having different coloured ranges instead of just grey vertical lines. And it removes the need to have markers that can get in the way if you have a lot of them.
Speaking of which, there should be an option to turn them off. I'm fairly certain I did one time, or was I dreaming that.