Libraries in Windows 7 are a cool new feature that allow you to access frequently used folders quickly and easily in file open and save dialogs. A library is pretty similar to a regular folder, but a library can either contain references to a single folder or multiple folders, you can learn more about libraries by referring to a post from Windows 7 team.
By default Windows 7 contains 4 Libraries for Documents, Music, Pictures and Videos, but you can add your own custom libraries that will allow you to access your favorite folders quickly and easily.
Follow the simple steps given below to learn how to add custom libraries to Windows 7.
How to Add Custom Libraries in Windows 7
Step 1: Click on the Library icon in the task bar to open the Library.
Step 2: In the Library window, click on the New Library to create a new library. Give the library an appropriate name.
Step 3: Right click on the library you just created and click on Properties.
Step 4: A new window will popup showing you options to add folders and customize the library. Click on the Include a folder button to add folders to your library, you can choose to add one or more folders. Once your done adding the folders click on Ok.
Once you have created the libraries they will start appearing in file open save dialogs (you can change this behavior in the library properties). You can also access all your favorite folders by simply opening the library again, pretty simple and useful.