What's new in SharePoint 2010
Like much of the Microsoft Office family, SharePoint 2010 is based around the concept of the Ribbon, Microsoft's interface that displays all of the options, choices and operations you can perform on any given page. It differs a lot from SharePoint 2007, which didn't have the Ribbon, but many of the same options are there -- just in a different place.
Key portions of the SharePoint 2010 interface.
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The Site Actions menu. This is where all of the action happens, literally. From here you can create new pages, document libraries and SharePoint-based sites; edit the pages you see; synchronize an offline copy of the site to the SharePoint Workspace application (assuming you have that feature as part of Office 2010); and access settings to customize the sites' accessibility and permissions. To change major aspects of sites within SharePoint or to create new items, you'll probably want to go to the Site Actions menu first.
The Credentials area. This menu, accessed when you click on your display name in the top right corner of the Web page, is where you sign into or out of a site, and where you change any user-modifiable sections of the Web page.
The Ribbon. Borrowing liberally from Office 2007 and Office 2010, SharePoint includes the Ribbon, a panel at the top of the window where almost all of the functions possible on a given page are grouped and displayed. Most SharePoint pages have the Browse tab turned on by default, which gives you a breadcrumb-style hierarchy. In other words, it helps you to navigate among pages on the site and see how you arrived at the current page. The Ribbon is also context-sensitive; it shows you different options depending on where you are within SharePoint. So if you're in a document library, the Library Tools Ribbon panel will appear; if you're in different types of lists, other tools will show up in the Ribbon.
The Quick Launch bar. Running along the left side of your SharePoint Web page, this bar helps you jump among the various parts of your site, including to different lists, libraries, discussion areas, picture collections and the site Recycle Bin. (This works exactly like the Windows recycle bin except it holds items from the SharePoint site only.) Another option is to see a full tree-like view of all the places on your site.
The Search box, where you can type in any sort of search query, click the magnifying glass icon to the right and then take advantage of the indexing engine on the site to get comprehensive results from any file that includes your search term.