I want to get a 5Ds, but I'm unsure if I can make it useful for my purposes.
I do studio work. My camera mounts to a tripod, and I use manual focus lenses. My 6D body has magic lantern, which offers picture-in-picture. Specifically, one section zooms on a portion of my frame. And at the same time, the other portion allows me to see how my shot is framed. With the 5Ds, which is not compatible with magic lantern, it looks like I have to press the zoom button -- and then it turns my entire screen into that zoomed portion. So, although I can then focus, I lose awareness of my scene. If my model moves slightly out of frame, I'll be completely unaware of that.
Does the 5Ds offer anything that would make this process easier than I'm anticipating?

