Getting a borderless print

Try this if that helps:

Using iPhoto to create borderless prints To use iPhoto to create borderless prints, please follow all of the steps below:

1. While logged in as an Administrator, install the latest Canon printer drivers onto your computer (with Mac OS X v10.2 or later as the operating system) and select the appropriate printer as the default.
   
   
2. Launch iPhoto.
   
   
3. From iPhoto, select and open the image you wish to print. (Please refer to the Apple web site for instructions on how to use iPhoto.)
   
   
4. When you are ready to make a print, select from the Menu Bar 'File: Page Setup'.
   
   
5. The Page Setup dialog will appear.
   
   
6. Select the following settings:
   
   
   1. Settings: Page Attribute
   2. Format for: <Select the Canon printer you wish to use>
   3. Paper Size: 4x6 (borderless)
   4. Orientation: <Select the matching orientation>
   5. Scale: <Select the appropriate scale>
      
      
7. Select 'OK' and the Page Setup dialog will close.
   
   
8. From iPhoto, from within the Constrain section of the browser window, select from the pull-down menu (i.e., the button directly above the Constrain label) either '4x6' or '4x6 Portrait'. Then, using your mouse cursor, mouse-over the image and when the Cross-Hairs are over the upper left-hand corner of the portion of the image you wish to print, click and drag from the left to the right in a downwardly diagonal motion, releasing the click at the end of the image selection.
   
   
9. Click the 'Crop' button.
   
   
10. From the Menu Bar, select 'File: Print', select your options, then select 'Print'.
    
    
11. This selection, revealed in the iPhoto window will now print as a borderless, 4x6 print.