I like what I've heard about EN so I'm trying it out. However, it seems like some very basic things are a hassle. For example, I've found an interesting pdf document online and I'd like to add it to my notes. Is it really necessary to download the document to my hard drive and then add it to EN?? I would have thought you could do this with a simple click of a button, but it doesn't appear that way, or I'm doing something wrong. Please enlighten me.