I don't have one but some of my clients do. It's very useful when 2 or more people are collaborating, to the point where I sometimes forget and try and do it to

I don't have one but some of my clients do. It's very useful when 2 or more people are collaborating, to the point where I sometimes forget and try and do it to my screen when around my laptop. I wouldn't call it a killer feature, but it's more useful than I imagined it would be.