增加一些颜色
    Expression Blend可以帮助设计师很快地完成草稿。另外WPF还有3D设计功能，比如下图左边一栏，可以很直观地看出每个系列中有多少张照片。3D制作很好的整合在整个工具中，设计师完全不需要另外一个工作程序来完成。

Now, I add a splash of color—and make quick prototypes of the controls using Expression® Blend™ to get a feel for things. This allows an interaction designer to better understand the problem domain and make better choices in terms of usability. I and thirteen23 believe that the best interaction designers work in tools that allow them to tinker.

One of the interesting things to note here are the volumetric sets on the left. Our challenge was to build a control that quickly identified how big the set was (how many photos it contained) in a glance. So, we built a volumetric set. Given WPF’s 3D capabilities we were able to easily accomplish this. The 3D layer is so integrated that the workflow is still the same. Traditionally, to add 3D you would have to jump to a different workflow or use some hack. Now, it’s all there…Simple.