[NTG-context] \setupTABLE commands?

I've been looking for a summary of available commands in \setupTABLE, but can't find it. I had thought the following (modified from the nattab manual) would get me a table centered on the page, with spacing before and after, but it doesn't: \definecolor[back-1][r=.8,g=.8,b=.4] \definecolor[back-2][r=.8,g=.8,b=.6] \definecolor[back-3][r=.8,g=.8,b=.8] \setupTABLE[background=color, frame=off, framecolor=white, location=middle, spaecbefore=1*medium, spaceafter=1*medium] \setupTABLE[row][1] [rulethickness=2pt,bottomframe=on] \setupTABLE[row][1] [backgroundcolor=back-1] \setupTABLE[row][odd] [backgroundcolor=back-2] \setupTABLE[row][even][backgroundcolor=back-3] Bruce