This video links to Page 131 in my Watercolor Book, from Wet to Dry and Everything In Between.

In this primer you will see how to make larger sized paintings from your 5"x 7" studies. It is very important to make the larger painting in the same proportion as the smaller study and in this video you will see how to do that. After you make the larger proportion correct, you will see how to scale up your drawing with a grid.