iPhone TIP: Better exposure

You are framing up a photo, and it’s too dark or light. 

What do you do? Take the photo anyway? 

Well, there is something that can help you get a better photo. Whenever I show people this, they light up with joy. 

Press the screen where you want to focus.
See the sun symbol. Hold and drag the sun up and down to lighten/darken photo.
Take the photo.