Yes, she is right. This is common issue for printing. When you view your photos from monitor, the light comes out from the monitor and enter your eyes. Usually the photo appears bright and clear. However if you view your printed photos, the light from ambient reflect from the print and enter your eyes. You will see your print is slightly underexposed. That is why the images need to adjust slightly brighter for printing. Same application to painting the wall.
thanks for explaining
i'm generally happy with the print colours except for a handful where it appears overexposed. some pics are deliberately overexposed to produce that dreamy, surreal feel, right?
but for that small handful of pics, the red (from strawberries) looks a hideous mouldy pink, the yellow (from an egg yolk) looks a pale vomit colour. and my human subjects look a pale yellow and lack that rosy hue i desire.
well, i dun think i can pick out a few and ask them not to tweak those. so i guess i'll save up for a monitor calibrator as recommended. should be a good investment for the long run.