How to turn on-screen interactive help ON/OFF

The on-screen interactive help to set to ON by default to help new users for first times of using "Math Graphics and Analytic" app:

On-screen interactive help

Users can use a settings tools to turn on-screen interactive help OFF or turn it ON if needed later:

Setting tools

On the settings screen, simply choose YES/NO options for "Show on-screen help" item:

Change option for "Show On-Screen Help" item