You can define the content and layout of Overview pages that you have rights to using widgets.
Spaces, projects, and groups become more inviting when you customize their overview pages to display the items members care about most. Depending on your overview page customization rights, you can easily get these pages to look the way you want to by using widgets that help you choose and arrange content. Each widget displays content of a particular kind — for example, HTML, recent content, or feed subscription results — in a box that you can drag into position on a page. After you publish the page, you can always come back and update its content or design. A complete reference to available widgets can be found here.
This topic offers a few ideas for designing pages with widgets. But the main idea is really very simple — once you get going, you'll find all kinds of uses for them.
To start customizing a page:
