You can go to Sitefinity backend -> Administration ->Backend Pages and create a new backend page/group page. Please make sure to set it to be shown in navigation and to be on in the first level of the Backend Pages tree, so that it will show up.
All the best,
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items