Are you generating Responsive HTML5 help output? You’d have a better chance with that flavour with mobile screens.
Yes I am but I am just worried about small mobile screens as I am using rather large screenshot images. You can view them ok, but they become a bit blurred when the screen size is too small, I didn't know if there was an option to be able to select an image for it to pop up in a small window.
Will have a look into that, thank you everyone for the help