The MyLifeBits shell is the main user interface. It allows queries to be viewed as a list, variable sized thumbnails, and a timeline. It enables refinement or pivoting according to metadata and links as described in the following section. It provides for the creation of text and voice comments. For example, any number of selected items may be commented on using the annotation function with a simple button or right click operation (comments may be text, voice, or any file). Similarly, these items can be assigned to collections. The screensaver displays random photos and video segments, and gives the.