This is Scenic control pad on iPad. iPhone is the same
The 9 squares bottom left are on screen when navigating. Tapping will pop the yellow and grey control pad.
I have noted the control areas.
The skip back / play / skip forward buttons will start IOS music players from the last song played. (Ringed in blue). Before a ride I will open an album or playlist and start a song then stop it. Once under way and I want music I simply press the play button.
Volume control buttons are ringed in red.
I find this really helps stop me mucking around with music player whilst riding which is just plain dangerous.