Decide which digital picture you want to turn into line art. If you are a novice at creating line art, choose a picture that does not have too many intricate details or multiple people.
Import the picture you want to turn into line art into a vector-based software program such as FreeHand or Adobe Illustrator. These programs will allow you to trace the images in the pictures and fill in details to create your line art.
Open the picture file in the program. The image will display on the screen. Open the "Preferences" menu and select "Guides and Grid." This will allow you to create guides around your image to help you as you trace it.
Select the "Pen" tool. You can now begin tracing the image in the software to create your line art.