Hand-switching bracket

[Yuval Harel]

Hi all,

	I want to typeset that half-bracket that marks that some notes are to be  
played by the opposite hand. I couldn't find any reference to it in the  
documentation. Is it supported? If not, is there a way to draw it manually  
(perhaps making an arpeggio bracket and somehow deleting the top line)?

Thanks,
        Yuval