[NTG-context] xtables multipage horizontally

Hi, the wiki says for xtables and multipage "yes, even horizontally". How can I do that? Doing this: \setupxtable[split=yes] is not enough since this only gives vertically splitting. Both http://www.pragma-ade.com/general/manuals/xtables-mkiv.pdf and http://wiki.contextgarden.net/xtables do not talk about this.   be ba