The welcome appearance can be customized via the
General > Welcome
preference page. You can use this preference page to select one of the pre-defined
themes, which affects the overall look of the welcome. You can also select which
pages will be displayed, and the visibility, layout, and priority of the items
within each page.
Changing the theme is as simple as selecting the theme from the list and clicking Apply or OK.
You can change which welcome pages will be visible to the user by checking them in the list. Each time you select a new page, a new tab will appear allowing you to customize the contents of the page.
To change the position of an item in a page, open the page's tab, and either drag and drop the item to its new location or right click and select one of the Move Up/Down/To options. You can move items around within the same section of the page or to other sections. To hide an item, simply move it to the Available Extensions section.
You can change the importance of an item within a page by clicking on the item's icon. A drop-down list will be available with the options low, medium, high, new, and callout. The different levels affect how and how much an item will be emphasized within the page (depending on the theme):