X30 - Change Layout - FW 3.10

Hi

We have a couple of Poly X30's on firmware version 3.10.
We would like to change the layout so that we can see more than 4 incoming video streams, however this no longer seems to be possible.

I have found this:
https://www.poly.com/content/dam/www/products/support/video/studio-x/user/poly-x-series-teams-mode-quicktips-en.pdf

However they layout version doesnt appear on firmware version 3.10.
Has this moved or has it been removed?

Thanks,

Rob