You may have known that you can create and maintain multiple iPhoto libraries by holding down the Option key when clicking the iPhoto icon in the Dock. This is a useful feature for those who have large collections of photos. In the past, you had to hold the Option key down while launching iPhoto in order to access the dialog box which allowed you to choose which library to open. With iPhoto ’09, you can now just double click the iPhoto library in your Pictures folder to access the library you want to work with. Keep in mind that iPhoto will “remember” the last library you had open, so clicking the iPhoto icon without holding the Option key down will open the last library you worked with. Why would you want to create multiple iPhoto libraries? Well, I like to create a new library for each year. Not only does iPhoto load faster, but it makes it much easier to back up each library to DVDs.