Form screens are an essential part of user interface design in many ways because their history is a lesson in how not to do things. Most applications need to capture input from their users at some point, and you need input widgets for that, but you should always consider the minimum amount of information you need to ask the user for, rather than try to get all the information you may need in the future. This approach will keep the user focused on the task they are trying to carry out. Presenting them with a wall of input fields is overwhelming to most users and breaks their focus, which in turn can lead to them abandoning what they were trying to do with your application.
This chapter is focused on form screens, and will walk you through a bit of their history before diving into a method for actually designing form screens. This approach can and should be reused whenever you need to design a screen for an app. It's always important to take a step back from...