imagePROGRAF PRO-1100 Image position on print

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Started printing on new Canon 1100. First 8x10 prints in manual feed were centered.

Last two prints in landscape the image was off center--very narrow left margin, not even 1/8 " and 1 inch right margin.  Hahnemuele Photo Rag Baryta 315 gsm, which worked fine yesterday.

Am I not feeding the paper in far enough?

Thanks,

jet