Hopefully I can make sense! I have started experimenting with a 10 stop ND filter. Now a while back someone showed me a technique on a Canon 1DX Mark II whilst using Live View. Essentially, while holding the shutter open on bulb (I think), the image would gradually appear on the LCD, and you would release the shutter when happy with the image displayed. Not very professional, I know, but good fun! The thing is that I have forgotten how to do this, or I must be getting something wrong, or maybe I misunderstood what I was seeing, or dreamt it. I have checked the manual and it specifically says that the exposure simulation will not work with bulb. OK, so what was I looking at? I distinctly remember seeing the image gradually appear on the LCD. Can it be done or have I lost some marbles?