Here's how you can enable button shapes in iOS 7.1. This will make it easier to see and tap on iOS 7.1's navigation links.
1. Go to Settings.
2. Tap on General.
3. Tap on Accessibility.
4. Tap the Button Shapes switch to enable them.
This small change to iOS 7.1 can be a big help if the default navigation is too hard to see.
If iOS 7's naked button look hasn't been to your liking, if it's made navigation harder to see and tap targets harder to hit, if you longed for the affordances of iOS 6-style outlines, then you'll be happy to know iOS 7.1 lets you get them at least part of the way back.More at iMore
Additional resources for iOS