Neven Mrgan's tumbl: Labeling the Back button

mrgan:

Most “deep” apps require some amount of navigation, moving the user deeper into child views and then back out to the parent view. That navigational backtracking is typically done with a “Back” button, positioned in the top-left corner, and denoted by a pointed left side. You’ve all seen it:

Comprehensive post on how to improve the “back” buttons that exist in almost every iOS application. Worth a read.