Hello !
Menu , Design > Grid System creates grid well but problem starts after creation, this is grid created according to settings depicted.
Have no idea according to what logic checkboxes are set that way if grid has left and bottom markers visible
But that is half problem , it starts to behave strange when I'm trying to make visible invisible parts of it, anyone with same issues ? It is very hard and even impossible to back to initial left bottom marker state after you trigered the checkboxes.