How to start Torch in Redmi Note 4?

Hardware Button Not provided anywhere. So attempt futile.

Icon for App of Torch Not found anywhere within phone leading to full puzzlement

Searching on net Will tell about pressing home button but not visible

Method When we start phone, we get unlock pattern
Below on phone there are 3 button.

1. The right sided one is Arrow type or horizontal V type.
2. The left sided button is 3 lines.
3. The central button is square. This is the home button they mean to press.

When screen for unlock pattern comes, I am not able to find these 3 buttons?! Actually they are not in the screen within. These 3 buttons are printed on screen and ate visible even when phone is switched off. See bottom or lower screen of the phone. Press right side small hardware Button to start phone, then press central square printed button on screen for a while. The torch will start.

See video below :-