Can we have an option to rotate files within Dropbox?

Thanks for the suggestions. I actually like Dropbox though. But now I've got another question for you, how do you collaborate with a customer. Not sure what you do, but I frequently share PDF attachments with customers that I like if they mark up in Dropbox with there revision requests. Do you have a recommendation for something that has PDF mark up tools along with ordinary commenting and notifying about document changes other than via email? I use Evernote a lot, but am looking for something even better.