TT.grid(geo = geo, at = NULL, text.tol = NULL, text.sum = NULL, blr.clock = NULL, grid.col = NULL, grid.lty = NULL, lwd.axis = NULL, tri.sum.tst = NULL, tri.pos.tst = NULL, class.p.bg.col = NULL, class.p.bg.hue = NULL, frame.bg.col = NULL, bg = NULL, col.axis = NULL)