[applekeynote] Formating a QuickTime file for HD

I am about to upload a presentation on Vimeo.com, which accommodates Hi Definition.
Vimeo recommends "using the H.264 codec at size 1280×720, bit rate 3000-5000 kbits/sec (optimized for "download"), key frame every 30 frames (frame reordering on), using whatever frame rate you shot in."
Question.  When I export my KN file to QuickTime, if I set the resolution to 1280 (X 960, to maintain proportions), the QuickTime file that gets created augments the size of the overall video frame but not of the images in the presentation.
Any idea how to create a QT file larger than 1024X768 through the "export" function?

Poki
http://pokicentral.blogspot.com

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