Sets grid orientation to vertical.
GRIDV(win1, win2, ..., winN)
Optional. Zero or more windows. Defaults to the current window.
displays vertical, dotted grids when a series is displayed.
griddot(w1, w3, w4);gridv(w1, w3, w4)
displays vertical, dotted grids for W1, W3 and W4 when a series is displayed.
GRIDV does not automatically set the grids to be visible. GRIDV must be used in conjunction with GRIDSOL, GRIDDASH, GRIDDOT, the menus, or the [F6] toggle key.