Hey @ocduk,
That is the New Row Layout system which is enabled starting from Pro 3.0.0, X 7.0.0, Cornerstone 4.0.0
You can learn more about the New Row by watching the following video:
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If you wish to use the Classic Row, click on the gear icon inside Cornerstone and open the Preferences tab. Then, set the Content Layout Element to Classic Row.

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I just like to add that in addition to the New Row, we also have a Grid layout system. I’d recommend that you check the tutorial videos in our Youtube Channel.
Hope that helps.