When adding vertical error bars to scatter plots, Excel automatically adds horizontal error bars. Is there a way to change this default? I never use x error bars, but often use y error bars. On my old computer (Windows XP + Office 2007) I simply deleted them manually a few times and then, somehow, it remembered and they never popped up again, with no other manual intervention. This isn't happening for my new computer, so I'd love to know how to disable it.