然而，它对于裁剪背景层或者删除图层的一部分非常有效。

However, they are a life saver when it comes to cutting out backgrounds or removing parts of layers.

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详细说明： ArcGIS engine二次开发的小程序，功能：添加shp、lyr图层，删除图层，移动图层，更改图例符号，属性查询，鹰眼，C#。

ArcGIS engine secondary development of small procedures, functions: add shp, lyr layer, delete layer, move layers, change the legend symbol, attribute query, Hawkeye, C#.

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你可以安全删除“0图层”，并只用你的新图层工作。

You can safely delete "layer 0" and work only in your new layer.

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