【Unity2D Keynote】
1、File Format Accepted by Unity
2、By double-clicking an object in Hierachy, you not only select the object in the scene but center the viewport on it for a better view.
3、You could select the cube and press Ctrl+D on the keyboard to replicate an object. 在组件面板右键弹出的选项面板，可以复制与粘贴组件属性。
4、By holding the V key while translating you can snap an object to vertices, which is great for fast, precision aligning.
按住V键，可以实现顶点对齐，先选中当前object顶点，再选中目标顶点，当前object即会贴在目标object上。
5、
原文：http://www.cnblogs.com/tekkaman/p/3538072.html