As an art teacher, I have had so many of my students not fill up the paper space. I pull out my big, nice, white, expensive paper for them to draw on a BIG project. There's always that one student that draws their main subject super small which leads to minimal detail. So, I point to the poster, "FILL UP THE SPACE"!!!! If the paper is big, draw big. Drawing big allows big detail. Hopefully this will help them be sm"art" when given a bigger canvas.