How to edit Post HTML source code in Wordpress ?

I would like to edit HTML code of post in Wordpress, but I can't find where can I switch to HTML editor. What should I do to edit post HTML source code ?

Hi,

To switch to HTML editor when editing the post in Wordpress, you have to:

Click into post's content and the following editing menu should appear above the block:



Then click on the three dots on the right and choose Edit as HTML: