The DEMO mode can be enabled in the device configuration dialog, and in this mode device behaves like in DISPLAY mode until it gets a touch event.
This touch event could be global or on a chosen image, and device will finish displaying the content at this touch.
Then the device gets into the default Android Launcher and user can look into the phone or the tablet while the Android Settings (or other chosen applications) are disabled.
After 30 seconds of inactivity the device continues working in DISPLAY mode.
We also have a lifting module that could be enabled and this feature detects if the device is lifted up and in this case it disable the 30 seconds timer.