Hi and thank you so much for replying. I am trying to print them through Nations Photo Lab and the error of "Low Resolution" is coming from there. It's a 20x40 canvas. I guess i'm not sure if I'm answering this correctly, but when I go to export my settings are 600x400 pixels and 240 ppi. Is that what you meant? I have also tried the custom cropping by typing in 20x40 and increasing the dpi to 300 but that also gave me the "low resolution" on Nations Photo Lab. Any help is appreciated as I feel I am really lost.
Thanks,
Joanna