Mike,
Thank you. The last upgrades fix 99% of the issues I encountered.
Maybe you should grey out the center and compact functions of nesting when Photo Mats are within the print page.
Not directly related to Photo Mats; the 3x (or other) short side fitting in custom size has conflicts with a border+ setting like the border+ setting had conflicts in the past in Fit to Page. I do no know what other issues appear when you make a border+ setting possible for that choice.
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Met vriendelijke groet, Ernst
http://www.pigment-print.com/spectralplots/spectrumviz_1.htmJanuary 2014, 600+ inkjet media white spectral plots.