C.Fn III -10 Focus Display in AI Servo/MF

Canon 7D: C.Fn III -10 Focus Display in AI Servo/MF
Do you want to see the focus confirmation in AI Servo mode or in Manual Focus mode?
0: Display the focus confirmation. It only applies to: the Zone AF and the full 19 points AF when in AI Servo AF mode and in the Manual Focus mode.
1: Do NOT display the focus confirmation in AI Servo mode or in manual focus mode.
Why make 0 the enable and 1 the disable when everywhere else is 0 = disable and 1 = enable?


