1. A method for facilitating substitution of a full bitmap version of a graphical image with a line drawing version of the graphical image in a graphical presentation, the method comprising: displaying a page in the graphical presentation, the page including the line drawing version of the graphical image; wherein displaying the line drawing version of the graphical image requires less data to be retrieved than displaying the full bitmap version of graphical image; allowing a user to input a command to display the full bitmap version of the graphical image; and if the user inputs the command to display the full bitmap version of the graphical image, retrieving the full bitmap version of the graphical image, and displaying the full bitmap version of the graphical image.