magento 2.1 how to switch to default design “luma” or “blank”?

Question

I have installed custom theme in magento and need to check working of fuctionality inside clean magento.

But I couldn't find how to change design.

At the image attached you can see "Search Robots" configuration, but before there was themes switching.

Where did they gone? Or is that magento bug?

Answer 1

In Magento 2.1 they moved the theme settings, it can now be found in admin under:

Content > Design > Configuration