\bodydir ** Can this be different to \pagedir? If it is different get warning warning (backend): pagedir differs from bodydir, the output may be placed wrongly on the page **
This is a good question. I wonder if this distinction is just an abstract one or there are some use cases where they would take different values. Perhaps one of them could be horizontal and the other vertical?
\linedir *** not documented at all ??***
It _is_ documented :-). Javier
