As I explained in another post, I usually use the section element to include the all of a page and I ‘d like to use the « main » tag ( HTML main Tag ) for this element, as I use the « section » tag for the container.
There are other tags that could be useful, as the « header » one ( HTML header Tag ) inside the Tag « article »
you can use the main tag for the section element, but you have to choose “custom” and then write your custom tag below.
However!
I don’t recommend doing this, because then you will have two main tags in teh dom. The first one is automatically created and holds all content. Please check a screenshot of what would happen:
Best regards,
Matej
There is a filter to change the main to a div instead. Then he could do as you note.
Or that, yes. Thanks, @cypher, for listing another option that honestly did not cross my mind when I was answering this. 
Best regards,
Matej
