I have a photo that is showing in GC as 450 ppi. The printer would like it in minimum 600 dpi. For the life of me I can't find a way to convert this to even see if I need to scan it again. I will welcome some help for this not so experienced photo editor
PS I should add that I was able to change the Mode of the photo from RGB to CMYK, but that didn't change the values under Size or Resolution.