iMac Sidebar Categories
Devices are any storage media or drive that you have available on your iMac. This includes hard drives, cds and dvds, flash drives, and even your iDisk. Clicking on any of these devices from the sidebar will open a folder with the contents of that drive.
Shared is where you will see shared devices such as a network drive that your iMac can see. It is also where you can access the MobileMe feature of "Back To My Mac," if you use it. I do not use this feature, so I cannot discuss it any further.
Places is the area of the sidebar I use the most. Places will display and allow quick access to any folder, application, or file you have on your Mac. To add an item to the sidebar simply click and drag it over to the "Places" area. As you drag a blue line will appear showing you the different spaces you can drop the file. When you find a space you like, unclick the mouse and it fits right into place.
While I am on the topic of adding to the sidebar I might as well also talk about removing items from the sidebar. This is as easy as removing something from the dock. Just click and drag it off the sidebar, let go, and await your cloud poof.
You can also rearrange items in the sidebar. To do this click and drag to the space you want it in. You can even drag files and folders into items on the sidebar. Just click and drag the file to the proper icon and let go.
This part of the sidebar is like having customized searches that are always on. It keeps track of recently used files and it also has a folder for images, movies, and documents. These items are in smart folders and will constantly seek out the above mentioned file. You can also change the parameters of what these folders are searching for by right clicking them or control clicking and choosing "Show Search Criteria."