Board Thread:Support Requests - Designing Your Wiki/@comment-38741379-20200929212412/@comment-45117243-20200929230321

Interesting. Indeed, the right rail disappeared from template pages on your wiki, and on other UCP wikis as well. I guess it'll be back soon. UCP is still under development and such things happen.

As for the main page - it is usually parted into the main part and the right part, but the right part is also for main page contents. You can take a look at the Main Page here on Community Central. For more information, see Help:Main page column tags, and you may ask if you need any help or clarification.