If you have been using iOS 7 then you must have noticed thanks to incredibly minimal design tone, pretty much all the buttons that are used to navigate around the OS are plain texts. You can tap in the vicinity of the text to go back and forth. However, this can be incredibly frustrating as you have no idea how far from the text is the sensitive area for navigation and you may end up having to tap again and again simply because you could not guess it right in the first shot.
With iOS 7.1, Apple has added some very neat Accessibility tweaks and the ability to enable button shapes across the devices is one such tweak. This would basically help form a fixed geometric shape around the text element, so you have a well defined region to click on when you want to navigate within the device. Here is a look, on how you can enable that.
Go into Settings App
Once you exit, you will see, system wide button shapes have been enabled. Not only that, we also noticed at few places, links are underlined and inside the Mail application, at least within Sparrow and default Mail app which are our mail app of choice, there was a darker Black completely opaque looking button on send. Not just this, some of the other elements such as dialogue box when notifying you have not entered a subject seems to have a weird underline too.
We are not entirely sure if this is a bug or not, but it sure looks very bold and unless you have used the app before may end up confusing you. Looks like iOS 7.1 still suffers from stuttering inconsistencies in the UI which have been a beat problem of iOS 7. You only hope, if this is a bug, it would be taken care of in the next update.