Reflections on children books images

I stumbled on One more book illustrated by Axel Scheffler. and found a demonstration of him talking and painting a gruffalo http://www.guardian.co.uk/books/video/2009/jun/10/gruffalo-axel-scheffler

Ah ah! now I know how he does it! quick quick, let's order inks and pencils!  I couldn't wait and had itchy fingers. Practised by doing something for my daughter:

Now I'm plagued with computer problems. I have to find out how to print something to the size I want (not a size pre-selected by the computer). I have asked just about anybody I know, and so far no luck!