The brief calls for finding the exposure settings at which highlight clipping first appears in a contrasty scene (some light and dark elements), then shooting one image one-step higher, followed by three images each one step lower than the preceding.
Simple as it seems, I am having some difficulty. What my Sony RX100 and Lightroom tell me are not the same.
This is a rather poor capture from my iPad, but it serves the purpose as it shows the camera reading a large area of highlight clipping on the left near a window. This flashes black in camera. Note that the histograms show minimal clipping in blue. Also note that this is not a live view available while shooting, but viewable only after capture.