Is it On? or Off?

I often get confused while turning on and off the LPG Cylinder regulator knob. Especially, since I do not cook regularly.
The LPG cylinder if not handled probably, would create a disaster. However, the knobs do not clearly indicate whether it is on or off. There are few instructions, but are located on the top of the cylinder. If the cylinder is placed below the kitchen counter, one cannot see them from the side.
As you see in the image, the instructions are too small small for something very dangerous.
It is time the LPG cylinders provide clear instructions on how it should be turned off/on. This will avoid the many disasters which happen in India every year.