Hi everyone!
We’re excited to share progress on a highly awaited feature - relations in main layout. We are reworking the display and searching through relations and moving relations to the main layout of the edit view to reduce the load time.
You can test the alpha version using the following command:
npx create-strapi-app@alpha
Since the feature is still in alpha, there are some bugs, we’re working on fixing them! 
Please, share your feedback with us, so that we improve the feature for the stable release.
Cheers,
The Strapi team