In your cloud video control room, different layouts are available here:
These templates (apart from the fullscreen) automatically adapt to the number of sources present in the video. So whether you are 2 or 9 in video, the template will automatically resize.
For the first 3 (speaker in big, split and PiP) you have the possibility to change the orientation. The icon updates to give you a preview of the rendering.
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You have the possibility to configure certain parameters such as the number of sources per line, margins, borders etc. etc. See Settings
Here are the different layouts and their examples:
Speaker in big
Dual sources
Picture in picture
Mosaic
Fullscreen
The arrows below the first three arrangements allow you to make a rotation.
For example, for the speaker in big layout, rotating it allows you to switch the speaker to the left, top, right or bottom of the screen.