How to draw on your iPhone in the Photos or Notes app using the Markup tool

It's easy to draw on your iPhone with the Markup tool in your Photos or Notes app. Here's what you need to know to do it.
The New York Times

I Finally Learned How to Draw. Here’s How.

For as long as I can remember, I’ve wanted to learn to draw. And for as long I can remember, I’ve been failing to learn to draw. I just couldn’t get the hang of it; every time I put pencil to paper, ...