Any way to convert single line of HTML into multiline?

Ctrl+Alt+L.But you need to remove 'p' from 'Don't break if inline content' list in Settings/Editor/Code Style/HTML, Other. And probably play with other formatting options

Sorry, what command is ctrl+alt+L? I'm on Mac and I also have customized my keymap.

Code | Reformat Code

Formattings rules can be configured at "Settings (Preferences on Mac) | Editor | Code Style | HTML"

Thanks. After changing code formatting rules, the best I could get was:

<div>
  <p>Text here.</p>
</div>

I couldn't get it to put the text on a separate line from the P tag.

Thanks! 

Anybody knows how to do it the other way around? (multiline to single line)