How can I customize the branding and communication by Sub-blocks?

How can I customize the branding and communication by Sub-blocks?

Sub-blocks can now be branded individually to have a customized look and feel separate from the rest of the event.

All of these options can be found on the Sub-block page.

And under the Communication

For more information about branding see the following articles: 
How can I customize the look of the Front-End?