IDA Pro展开结构（Expand a structure）

Action    name: ExpandStruct

 This command expands the current structure by inserting undefined bytes at the cursor location. The cursor must not be at the end of the structure. To define a member at the end of the structure, just use normal data definition commands.

This command is available when you open a structure window.

以下为中文翻译：

name:ExpandStruct

此命令通过在光标位置插入未定义的字节来扩展当前结构。光标不能位于结构的末尾。要在结构的末尾定义成员，只需使用普通的数据定义命令。

打开结构窗口时可以使用此命令。