We should have documentation for all those feature for our official release on January 14th. Everything is currently being written. To enable custom fields you have to perform the following steps:
1. Go to News for example and create a single news item
2. Go back to the list of all news items
3. On the right panel you should see the Settings
section that should have button for "Custom Fields in News" from there you can create your own custom fields and decide on which views you want to associate them. Note that we have a known issue for associating custom fields to specific views that is also part of the release notes.
Thank you for contacting us, and we look forward to receiving your highly valuable feedback for our RC2 release.
the Telerik team
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