More viewports in more layouts

I know how to change the viewport to side by side, quads, 1 left 3 right, etc. Is there a way to further change the number of viewports.

Like when working on a portrait image, have two view full vertical, and the thre small views on the right or left.

Or just 3 vertical side by side views. Or 3 horizontal top middle bottom.

Or is there just the given configurations and the aux viewport that you put on one of the sides bars?

 

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