change background colour

[rejo]

Been searching for a long time and not found anything.
What i'm trying to do is change the background colour on a slideshow in iphoto.
I'm using the shatter display option and when the photos turn into the next photo i get this white background colour.
Anyone know how to change this ?
Cheers.
Jo

 

[chas_m]

As far as I know, the option to change that is unavailable.