No Source View?

I downloaded and installed the Gutenberg plugin to get a preview of what’s coming in WordPress 5. I was disconcerted about the lack of a source view. Certainly there must be a way to view the source without exiting Gutenberg and choosing ‘Classic Editor’, right?

The template selector on pages also seems to be absent. I understand that this is still in development and I’m hoping these features are coming to Gutenberg soon or at the very least the classic editor option will remain available. Thanks!