Help System > Download a free gray card
A "gray card" allows you to set the white balance of a picture. It can help make sure the colors are correct in your pictures, when you photograph your art.
Make sure that the gray card is in the shot when you take a picture. In your image editing program, use the "white balance" tool to click on the gray square to adjust the white balance correctly. The video below wxplains more.
Click to download the gray card (18K, PDF)
Watch how to use a gray card here: