Song book - vertical / right-left font

Does the RAB Song book “option” support a font that reads vertically downwards, starting at top right of the page and moving leftwards by columns? If so, what kind of input file should be used?

@richard is it possible for RAB to handle Vertical-RTL scripts from SFM sources? At the moment we are getting vertical text layout in the main body, working by using epub (XHTML) but that is not ideal.