 
     public struct Appearance {
 
-        /// Overlay's Color
+        /// The color to use when drawing the background overlay for messages, icons, and progress
         ///
         public var overlayColor = UIColor(white: 0.6, alpha: 0.6)
 

        clone.extraAttributes = extraAttributes
        clone.url = url
        clone.lastRequestedURL = lastRequestedURL
        clone.imageMargin = imageMargin
        clone.delegate = delegate
        return clone
    }

        }
    }

    /// A message to display overlaid on top of the image
    ///
    open var message: NSAttributedString? {
