For rotation lock
Screen rotation lock
I switch between the two
Still mute, on all my iPads.
"Riches can be lost, but happiness in your heart can only be veiled, and it will still bring happiness again, as long as you live." Anne Frank
Rotation lock, I read and watch videos sitting up, laying down and half way.
I've always used mine for mute since I've had the devices. Never for rotation lock, I don't really see any reason to use it.