I normally don’t write a screenplay. I draw it. The film comes alive as a sequence of images on paper instead of words. This way I can “catch” the film I have in my mind.
I usually like to sketch to understand a concept and I remember something better if I associate it with images. Sometimes while riding on the subway, I draw on a piece of paper to memorize an idea I have and I even draw the recipes my mother tells me by phone.
When they asked me for the screenplay of my previous film Bedford to be published in a book, I had to send them the storyboards since I didn’t have a screenplay per se.
I believe you can still find the book ("VI Concurso Iberoamericano de Cortometrajes Versión Española/SGAE") on www.factoriautor.com.