Ken
Swiping a control left/right definitely works on my test devices.
It can be a bit fiddley on small screen.
If you hold on the control for a moment then as you swipe sideways you should see an orange background background...
It's shown towards the end of this video:
https://www.youtube.com/watch?v=OhMX6qyFNAQ&feature=youtu.bePeter