I have been mistakenly exporting pictures from lightroom at 240 PPI. My question is, if I open these images in PS, and change the image settings from 240 PPI to 300 PPI, will this alter the image in any way. (For printing) I thought I remembered that it is alright to go down in PPI for images in PS but not up. I still have originals, so if I need to re-edit accordingly I can. I am having a brain cramp today and it hurts. Someone please save me the trouble. Thank you!!!!