Framing with a fixed lens is incredibly challenging, and while I was up to the task, as a casual photographer, I can't say it enriched my experience enough to warrant unloading an extra two grand of hard-earned cash.
The lens retraction and extension is faster using the Zoom Framing Assist button than the zoom lever, and allows the photographer to keep the camera more stable for the shot, this is particularly helpful for those trying to zoom in and shoot pictures of animals or moving subjects.
By simply pressing the Zoom Framing Assist button located on the lower front left of the camera, the lens will quickly zoom out to help you re-locate and frame your subject.