Here's what each caps button state means:
- Grey button with a white arrow: Caps off
- White button with a black arrow: Caps shift for a single character
- White button with a black arrow and black underline: Caps lock on
Caps off (left), Shift on (center), Caps lock on (right)
Apple may be a leader in interface designs, but that doesn't mean they always get it right. Luckily, they can keep making changes to items like on-screen keyboard elements since they're software-based. That's a lot easier than physically replacing the shift key on our keyboards.