Solodigitalis Community Support

I know that there's a border setting for each individual photo in the collage, but it'd be nice to also have a border around the entire collage. I'm currently using a Canon PIXMA MX922 printer, connected via AirPrint. With AirPrint, it automatically prints the 4x6 photos in borderless printing mode. As far as I know, there's no way to disable this. With borderless printing, the image is enlarged and the outer parts are cropped off. If we can add a border around the collage, this can compensate for the enlarging and cropping that borderless printing does.

Airprint doesn't enlarge the image - no parts are cropped by airprint. If this is happening, it is your printer.
In wifibooth 3.3.0 you have the additional option to turn off outer borders independently of border thickness. You can also experiment by changing the paper size.