How can I see theme variation images in Keynote? I was emptying the trash and noticed some images in a "recovered files" directory named something like sotryboard-paper-green-flat.tiff with variations for colour, gradients, etc. - These seemed to be variations of the default background and shape-fill images for the Keynote "Storyboard" theme, I had recently been making a Keynote using that theme so I figured it was some temporary files relating to that. "Great!" I thought, "I'll go and check out how to use those variations later."

So now back in Keynote using the Storyboard theme, when I create shapes they have a blue (tiled) fill-image and if I select Choose... it takes me to my own PresentationAssets directory from where I've loaded up images before. I don't know where to look for these built-in textures which are designed to fit with the theme, how do I find and use these images?
The built-in files for Keynote are stored within the package. Go to:


  /Applications/iWork '09/Keynote.app/Contents/Resources


EDIT: The theme files themselves, at least on my machine running iWork '09, boxed version, are stored here:

/Library/Application Support/iWork '09/Frameworks/SFRendering.framework/Versions/A/Resources/Frames


Each theme contains a file with a suffix of sfrframe. Inside that file are the images for each theme.

Also under /Resources is a folder called /Themes. Within it are several theme files, shared images, etc. Each theme has several .kth files, which contain theme files and metadata.