Lines in Pre-Drawn Files

• 1). Click on the "Fill" button from the toolbar on the left side of the screen. This button is represented by a spilled paint can.
  
  
• 2). Click on the color you want to use in the color palette on the right side of the screen.
  
  
• 3). Click on the lines you want to colorize. The lines are automatically filled in using the desired color. However, the fill tool only applies to pixels of the same color. Depending on the texture of the line, you may need to click on several individual parts of the line and fill several pixel blocks separately.
  
  

Lines Drawn with Illustrator

• 1). Click on the "Selection" tool, indicated by a black pointer. If you drew the lines directly into the file using an Illustrator layer, you can colorize them directly without the Fill tool.
  
  
• 2). Click on the line.
  
  
• 3). Click on your desired color from the palette on the right side of the screen. The color change is immediate.