Org-mode in emacs: how to move the entire header one level down
I have an org
* second level
** third level
*** fourth level
And then I find that the second level should be ** the second level instead of * the second level, so I want to push all the header one level below, the result is
* some heading which I will add manully
** second level
*** third level
**** fouth level
+3
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