Setting a Color in the Image to be Transparent

  1. Click in the Advanced property to display the Image Preview window.
  2. Mouse over the pixels in the image to display their RGB values.
  3. Click the eyedropper and select a pixel in the image that is the color you want to become transparent.
    You can use the zoom slider to resize the image and you can drag to pan the image within the window.
    The color you selected appears in the drop-down next to the eyedropper icon. You can add multiple transparent colors by repeating this process, and remove colors by clicking Delete Selected Color or Delete All Colors icons. The image window previews the image with the transparency you selected.