I wish there was a feature like this, but no. I keep having to tell my mom how to take screenshots, because she never remembers how. I also take screenshots of my iPad and send it over iMessage to help explain things. Since we both have multiple iPads, sometimes we end up on FaceTime, waving the iPad we are working on at each other. We manage. But yeah, a secure way to remote control an iPad would be great for troubleshooting.