通过双击代码行旁边的灰色空白边，就可以设置断点。

You can toggle a breakpoint by double-clicking the gray margin beside the line of code.

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您还可以双击源代码行旁边的标记栏。

You can also double-click the marker bar next to the source code line.

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另外，如果双击错误消息，则可编辑位于大型机中的COBOL程序并显示错误行(图4)。

Also, if you double-click on the error message, the COBOL program that is located in the mainframe is edited and an indication of the line in error will be shown (Figure 4).

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