Thanks, Dave. I will try that. I have only had a quick play (other things getting in the way at the moment!). I hadn’t tried the 4 comparison views. just the split screen.
It probably doesn’t matter what the percentage means but it just gets under my skin when I see something I can’t understand – especially when it’s computer related. Oh for the days when they provided a User Manual. I sometimes get the impression that the user doesn’t come high up the priority list UIs are written (remember the ‘Engineer’s Swing’?).