I haven't figured this out either. I was hoping Lollipop would have this figured out, but it's even WORSE than the previous OS version. In fact, they stripped out the ability to use a photo frame or photo table entirely during Daydream mode. Really ticked me off, because when I was wireless charging my phone on my Tylt, it would run through my pics like a digital photo frame - looked real nice. Now it's just a stupid digital clock.