Constant Content

Hi,
I just posted a Hawaiian travel article. I have lots of images available, but I had trouble uploading one. I think it was too big.
What size is allowed? Do most of the customers use the content online? Is a 72 dpi preferred? 4 x 6 inch???
Also, can I add an image or image(s) after submittal?
Thanks.
Cheryl Rogers

It's probably the file type and file size that are of more concern than the actual physical picture size. Not that I could tell you what CC prefer of course but digital photograps tend to be huge in terms of KB unless you convert them.