I don't know that photoshop does it by default, but I wrote something to do batch resizing for a folder a while ago for some banners we had on the site. It may be a built in function now, I don't know. You basically just record what you do and then do that to the whole folder. If your batch process is made to save the file with the same name, then there is no reason you can't just upload them to overwrite the existing ones.
I would NOT do this on a live site. I would practice it on a text site. Also, when testing, make sure you clear your browser cache or you may *think* all is OK when it actually isn't.
|