But, if you've done some other type of editing command, like, say I press " x" to delete a character... If I do " u" for undo, it'll just undo that change that that editing command made.

但是，如果您执行了其他类型的编辑命令，例如，说我按“x”删除字符...如果我执行“u”进行撤消，它只会撤消该编辑命令所做的更改。