uGUI
After Unity version 4.6 or higher, "uGUI (Unity UI)" GUI Components is available for free. >Various "UI object" are available by selecting "Create" -> "UI" in the Hierarchy.
Explanation of how to use "Panel", "Button", "Text", and "Image".
http://www.atmarkit.co.jp/ait/articles/1503/11/news045.html
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