As everyone know you can easily double tap the shift key on the iPhone to access the Caps lock mode which is a pretty nice feature and takes up less room. But when you enter the numerical/symbol/puncuation keybords, whether you be in the numerical keyboard or the more mathematical foreign currency keyboard, you can double tap the key to switch between these two keybords (not back to the alphabetical keyboard) and it turns blue just like caps lock. What in the world does this do? I'm sure it's obvious what it does to many out there. But not myself.