Answered
dw的光标变成了横光标
怎么变回竖光标呀

怎么变回竖光标呀

There's no need to delete the post. Here's the answer for anyone else who encounters the same problem.
The cursor is vertical in Code View when it's in Insert mode. It becomes horizontal in Overwrite mode.
Switch between Insert and Overwrite mode by clicking this button at the bottom of the Document window:


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