# 5.2 群组

每个[数据库](http://www.howsci.com/tag/library/)中可能有很多组，为了管理组，[EndNote](http://www.howsci.com/tag/endnote/) 推出了群组这个功能。每个数据库最多可建立5000个群组。群组可以包含任何自定义组和智能组。

群组标题前面的 (+) 或 (-) 可以展开歌者折叠群组，群组折叠时会显示当前群组下文献的数量，这个数量也把重复文献计算在内

有些群组是自动生成的，不能移动或者重命名，如 Online Search 和 Find Full Text 群组


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